Category Archives: Materials and Equipment

May 4, 2007 — NaturalNano, Inc., a materials science company, has entered into a joint development agreement (JDA) with Cascade Engineering, a developer and manufacturer of plastics products. This is the second JDA that NaturalNano has announced in the second quarter of 2007.

The new partnership will center on commercializing NaturalNano’s Pleximer products for a range of industries. Pleximer, a turn-key nanocomposite additive, promises a substantial impact on the properties of polymer composites, namely enabling the development of stronger, lighter materials. NaturalNano says that Pleximer is a low-cost alternative for the polymer nanocomposites market, which is the fastest growing segment of the polymer composites industry. The segment is predicted to more than double in size from $300M today to $740M by 2010.

Both NaturalNano and Cascade Engineering anticipate applications in numerous products, leading to utilization of filled halloysite nanotubes (HNT) to develop materials with functionality such as flame retardance and antimicrobial properties. The companies’ joint development collaboration is an important benchmark in Pleximer’s development timeline, says NaturalNano.

Over the last several months, NaturalNano demonstrated the production of polypropylene and nylon Pleximer on a pilot and manufacturing scale. The resulting materials exhibited excellent dispersion and improved the mechanical properties of the polymer. The highly concentrated Pleximer product would be added to pure polymer in the final molding process by Cascade Engineering to obtain nanocomposite materials with the desired properties for a wide-range of applications.

NaturalNano and Cascade Engineering now plan to pursue jointly developed accreditation testing, application definitions and formula optimization that will be used in the pilot and manufacturing processes to produce Pleximer-based nanocomposites for multiple polymer systems.

The IEEE Nanoelectronic Standards Roadmapping Initiative began in 2003 and is co-chaired by Evelyn Hirt (Battelle) and John Tucker (Keithley Instruments). It defines standards for near-term transitions from lab to commercial use, and anticipates standards for higher integration of nanomaterials for future applications. The committee completed one standard: IEEE 1650, “Standard Test Methods for Measurement of Electrical Properties of Carbon Nanotubes (CNTs); and is making progress on IEEE P1690, “Standard Methods for Characterization of CNTs Used as Additives in Bulk Materials.”

By Meredith Courtemanche, assistant editor


Carl F. Kohrt
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Managing industrial innovation is a challenge, whether in a corporate setting or in research. In 2001, Carl F. Kohrt brought experience from both realms to Battelle Memorial Institute, a charitable trust established in 1929 to commemorate a leading steel family in Columbus, Ohio.

Today, Kohrt oversees six national laboratories (Pacific Northwest, Brookhaven, Oak Ridge, National Renewable Energy, Idaho, and the U.S. Department of Homeland Security), a staff of 20,000, and a $3.7 billion budget. One of his accomplishments has been to get these labs to collaborate. They target energy and manufacturing projects. Battelle researchers are developing carbon nanotube materials for many applications appropriate to their clients’ commercialization goals.

Battelle is involved in projects for nearly 2,000 companies and government agencies in 30 countries. The organization also is active in community work, including education, diversity, and cultural activities. Here, Kohrt tells Small Times’ contributing editor Jo McIntyre how he keeps track of it all.


Q: In one day, Battelle announced it had donated $1 million to the National Society of Black Engineers and that the Battelle Energy Alliance had placed a $150,000 order for the U.S. Army for five visual first responders made by View Systems of Baltimore, Md. Is this a fair sample of the range of your daily activities?

Yes. There are so many things we do globally. As a CEO, the metaphor I use is that I pick the music, but I’m not even sure I direct the orchestra. There are many talented people here.

Q: How many of your labs are involved in nanotechnology research?

All of them: It’s a fundamental building block of Battelle. It takes many forms and goes back to 1977. There were nanostructured materials then; they just weren’t called nano. Work we did at Kodak was based on nanotechnology. The reality is we’ve been working at small or molecular levels for a long time. What’s changed is the tools that are available and the knowledge of how to use those tools to manipulate materials at that scale.

Q: What are the most important areas Battelle is working on these days?

Here are three: Energy, expansion into Asia, and education. One of our largest portfolios is in the general area of energy. That will be a platform for Battelle increasingly because of our association with the U.S. Department of Energy.

Projects include carbon management, finding new ways of obtaining carbon in a clean way from coal; fuel cells and solar energy, the more portable parts of energy, and one of the primary areas of alternative energy for the nation; and last, nuclear. We have formed a group working in Idaho on behalf of the Department of Energy researching the next generation of nuclear power.

Q: And the other two areas?

The second-to give a little different flavor-is our expansion into Asia. We’ve historically had activities going on in a lot of places in the world. We used to have a lot of presence in Europe, but have reduced the physical presence there. In Korea and Japan we have opened up facilities. We will see where China and India come in the next few years.

Third is education. In the last three years, we’ve decided we are in a position to have an impact on education both nationally and locally. We started a public high school in conjunction with Ohio State to help people learn about science and technology by helping them move on to careers and having them learn in work places. We have seven different sites around the country.

Q: Which projects are closest to commercialization of nanotech ideas…

Keep your eye on applications of health-drug delivery. That would probably be the place I think that might occur. It could also be in communications-improving techniques and doing more for less.

As I’ve learned about nanomaterials, they fall into general categories. With some things we already do, as in bumpers on cars, nanocomposites can fit into bumpers to improve the weight ratio or other performance. They improve performance, but do not change the function. Another category is to do something we’ve never been able to do before. That will come, but it will probably be not the immediate path for commercialization.

Q: … or is most research geared toward military applications?

Military applications are about one-third of our business. They are willing to pay at a higher level than what a commercial market could find. Several applications of nanotechnology for government purposes are some of the areas where we already have great confidence there will be some commercial applications. We feel the composites and new materials will find their way into the aerospace industry.

Our goal is to get technology into other people’s hands. In some cases, that’s for the service of the nation, but our history has been most effective at getting things into companies. That’s how technology gets propagated-by getting into the market side.

Q: Battelle helps develop new products for commercial customers. How do you do this?

How do we do innovation? Our general philosophy and behavior is that innovation is curiosity-driven. Most ideas are walking around on two legs. Some scientist or inventor sitting in his easy chair has a flash of brilliance. That generates an idea. What Battelle does is ask, “Will anyone care? Does it solve a real problem?” The idea is to make the connection between what is possible with what is needed.

Battelle is not a regular company. We operate in the first 50 yards of that 100-yard football field. Taking it into the marketplace is something we generally do in collaboration with someone else. We don’t do manufacturing, or sales and distribution.

Our collaborators often have the best sense of what people need, but don’t know what’s possible. When you get the Battelle gang that knows what’s possible, then we find the common ground. Often they pay us to do that, then we go away, but increasingly, we are becoming co-investors and sharing in the return.

Q: How do the national labs fit into this picture?

We directly manage six labs. We have a particular way to do that. It’s outlined in a book called The Battelle Way, which contains the cumulative knowledge over many years. Pacific Northwest Laboratory has been in existence for 44 years and is a U.S. Department of Energy-owned lab; Idaho National Laboratory’s Battelle Energy Alliance is a joint venture with other groups; Oak Ridge National Laboratory is co-managed with the University of Tennessee; Brookhaven National Lab is co-managed with Stony Brook University; and the Renewable Energy Lab is co-managed with Midwest Research Institute.

The sixth and newest lab, the U.S. Department of Homeland Security Lab, just commenced in January this year and is 100% managed by Battelle.

We are competing to manage four other existing labs. Commercial companies or other agencies compete for contracts to manage these labs. This government-owned, contract-operated structure is unique to the U.S.

Q: Do these labs now work together?

Yes. What Battelle has done is provide the vehicle to touch all the labs. People can go to these labs and get help. In practice, most companies don’t know where to go and what questions to ask. We still have a long way to go in terms of honing that to perfection. We’re the only contractor to do this.

Q: What is Battelle’s relationship with government agencies?

We team with more than 800 federal, state, and local government agencies, doing research on national security, homeland defense, energy and environment, health and life sciences, and transportation and space. Battelle has three basic groups: lab operations; applications, where most government work falls; and commercial operations that focus on extracting technologies and applying them to start new companies or improve existing companies.

Q: What changes have you overseen during your five years at Battelle?

The organization in principle has maintained its mission of service to community and nation using science and technology to do that. The thing that is most different is that we have found a way to use all the assets in a more-effective and balanced way. The result is we’ve almost doubled in size.

The management team consists of eight people on the executive committee. Other than that, we’ve had the benefit of continuing to work together. We started out as a bunch of metallurgists; now we’re doing biology and other projects. We want to maintain our relevance by bringing the best ideas forward.

Q: What have you personally been doing lately?

I set the tone and strategy and culture. I consider my job mostly as a strategist, setting the tone at the top as a ‘culture cop.’ Labs populated by good scientists and engineers are devoted to discovery. Others I work with are close to customers; they have a different focus. Then there are venture capitalists. Getting these three to work together is my job.

My second job is to be the face of the company. I’m expected to articulate the values of the company. I spend a lot of time in Washington, D.C., and around the world. I’m out of the office a lot.

Q: What accomplishments are you most proud of at age 63?

I’m proud of the organization. I have always taken great pride in being part of an organization that is successful. If it is successful, then indirectly, I’m successful. I hope my legacy will be taking great assets that weren’t being fully utilized and facilitating horizontal collaboration.


The Kohrt File

Before joining Battelle as president and CEO, Carl F. Kohrt spent 29 years at Kodak, where he served in such management positions as executive vice president and chief technology officer, vice president and general manager of the Health Sciences Division, director of the Photographic R&D Laboratories, and research scientist.

Kohrt led Kodak’s research and development efforts to adopt market-oriented directions and encouraged the company to enter digital and networked businesses. He also headed Kodak’s Corporate Diversity Council.

Institutions that teach skills and nurture innovation: A guide for students, researchers, inventors, and CEOs

BY SMALL TIMES’ STAFF

Looking for an education or for a research partner? How about a commercialization cohort? Or perhaps employees for your growing small-tech company?

The micro-nano revolution needs revolutionaries. How will you fit into the picture-or find the people who will help you carry out your mission? To understand what might be the best options for you, you need information about higher-ed institutions focused on micro- and nanotechnology. You came to the right place.

Here is Small Times’ third-annual rankings report, based on the results of a survey conducted with dozens of universities and colleges. Our questionnaire included 26 questions, several of them multi-part, designed to reveal the institutions’ capabilities-so that you can find what you’re looking for. We analyzed the entries to determine relative strength in four key areas: research, education, facilities, and technology commercialization.

To provide a different perspective from what our analysis shows, the questionnaire asked respondents to rank peer institutions. This “academy-awards” type of approach reveals average assessment among academe and also enables us to discuss universities that did not respond-in detail or at all-to our call for entries.

The results of these ranking exercises are summarized in the sidebar, “Top 10, by category,” on p. 30.

The rest of our report is separated into three sections. Beginning on p. 19 we present summary descriptions of the universities that ranked among the top 10 in any category of either our analysis or the peer rankings.

On p. 28 we present information on a handful of community and technical colleges active in micro- and nanotechnologies.

On p. 32 you will find a listing of all the universities that responded to our survey. Here we briefly describe the institution and summarize its centers focused on micro- and nanotechnology research.

We hope the listings and descriptions that follow help you in selecting a university or college for your particular needs.


The University at Albany-SUNY

The University at Albany-SUNY (UAlbany) maintains its lead position in Small Times’ study, especially in terms of education, facilities, and commercialization. UAlbany is proud to say that its College of Nanoscale Science and Engineering (CNSE) is “the first college in the world that is dedicated to the conception and dissemination of nanoscale know-how.” CNSE oversees and coordinates all of UAlbany’s work in both nano- and microtechnolgies: educational, research and development, technology deployment, and economic outreach.

Launched three years ago, CSNE is widely recognized as a global resource for research, development, workforce education, and economic outreach in nanotechnology and its applications.

CNSE is organized to address four fundamental disciplines-nanoscience, nanoengineering, nanobioscience, and nano-economics-and has arranged these “constellations” as catalysts to encourage cross-disciplinary education and research. Each offers its own doctoral and Masters’ programs. In fact, UAlbany offers more micro- and nano-specific degrees than any other university: six in total, with small-tech minor/emphasis allowed in additional M.S. and Ph.D. degrees. The university offers 100 nano- and micro-focused courses.

CNSE integrates the educational, research, and outreach activities of students and faculty with those of more than 200 international corporate partners. The center has also developed a number of global educational and research partnerships.

UAlbany was awarded more nanotechnology patents (98) than any other respondent in the Small Times’ survey.

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Cornell University

Cornell encourages interdisciplinary academic programs and research. Its innovations include its nanofabrication facility and discovery in the field of nanobiotechnology. The university’s mission is to generate new knowledge about micro- and nanoscience and then to transfer that knowledge for the public good.

Among Cornell’s strengths are the following:

  • Molecular transistors and single molecule devices, micro- and nanoscale resonators, growth of complex materials, encapsulated organic dyes for fluorescence applications, and organic electronics;
  • High-resolution surface patterning of biological compounds, microfluidics, engineered DNA-probe constructs, ordered polymer nanofibers, and single molecule detection, observation, and manipulation techniques;
  • Nanomagnetism, nanoelectronics, and nanophotonics, e-beam lithography, and MEMS; and
  • Nanopatterning, (e-beam lithography), pattern transfer (dry etching), nanobiotechnology, and nanofabrication process integration.

Cornell’s micro- and nanoscience programs have strong links to biological and agricultural researchers and have a growing engagement with Weill Cornell Medical College.

Cornell does not offer micro- or nano-specific degrees, nor does it offer engineering or science degrees with a minor in micro- and/or nanotechnology. However, B.S./M.S./Ph.D. students in a number of departments have sufficient offerings to constitute an emphasis in micro- or nanotechnology-and in our survey, Cornell ranked highest among all respondents with regard to undergraduates focusing on MEMS and nano, both separately and together.

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University of Michigan

The University of Michigan’s research spans the physics underlying the creation and use of nanostructures, materials, and processes to their practical implementation in both micro- and macroscopic devices and systems. Nearly 100 faculty and more than 700 undergraduate and graduate students are engaged in this research, which is funded with more than $550 million.

Multi-disciplinary research centers devoted to small tech include the Engineering Research Center for Wireless Integrated Microsystems (WIMS ERC), which is funded by the National Science Foundation (NSF). The WIMS ERC develops microsystems that merge micropower integrated circuits, wireless interfaces, advanced wafer-level packaging, and integrated sensors and actuators.

The university’s Solid-State Electronics Laboratory (SSEL) enables work in microelectronics, micromechanics, optoelectronics, and micro- and nanotechnologies based on silicon, compound semiconductor, and organic materials. It operates the Michigan Nanofabrication Facility (MNF), a nanofabrication user facility that consists of 6,500 sq. ft. of class 100/10 cleanroom space. The MNF has been part of the National Nanotechnology Infrastructure Network (NNIN) since its creation in 2004.

All these activities are supported by university-wide facilities for crystallography, mass spectroscopy, electron microscopy, and large-scale computations. The University of Michigan offers three small-tech-specific graduate degrees: Ph.D. in Solid-State Electronics, Ph.D. in Circuits and Microsystems, and M.Eng. in Integrated Microsystems.

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University of Illinois at Urbana-Champaign

The University of Illinois at Urbana-Champaign (UIUC) incorporates more than 16 major centers and laboratories and covers 10 colleges and schools as well as 30 departments. The Center for Nanoscale Science and Technology (CNST) is the University’s premier center for nanotechnology research, education, and outreach activities. CNST says its strength comes from involving more than 150 faculty members and more than $200 million in micro/nanotechnology resources.

Last year, the Micro and Nanotechnology Laboratory (MNTL), a user facility that is one of the nation’s largest and most-sophisticated university-based centers of its kind, underwent an $18 million expansion. UIUC counts among its specialties bioimaging, bionanotechnology, computational nanotechnology, MEMS/NEMS, and a host of other nano-focused disciplines.

UIUC’s micro/nano research has spawned a number of companies in the past, including NanoInk in 2005, and already in fiscal year 2007, two small-tech companies have formed. Each year UIUC hosts events, including the CNST Annual Nanotechnology Workshops (since 2003) involving academia, industry, policy makers, and the general public.

In our survey, UIUC reported the greatest number of professors and the greatest number of grad students doing research in both MEMS and nanotechnology-separately and combined.

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Penn State University

Penn State University is a leader in micro/MEMS/nanotechnology education and research. In 1993, Penn State opened the Nanofabrication Facility (NanoFab), a part of the National Nanofabrication Infrastructure Network. Its Center for Nanotechnology Education and Utilization offers one of the nation’s leading nanotechnology workforce development programs.

Many consider Penn State to be first in the country for materials research and second in industrial support of research. The university’s strengths are embodied in collaborative materials research covering a broad range of nanomaterials, and employing expertise from disciplines spanning AgBio through Engineering to basic Materials Chemistry and Condensed Matter Physics. An interdisciplinary graduate degree program in materials brings students and faculty together across these disciplines.

Both local and international industrial collaborations grow out of Penn State’s research. All of the university’s centers and facilities possess a mix of faculty, research associates, undergraduate and graduate students, and industrial partners.

In our survey, Penn State placed second in number of both faculty and graduate students doing research in micro/MEMS technologies. The school also placed second overall in grad students focused on small-tech research-both micro and nano.

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Arizona State University

Arizona State’s specialties include nanofabrication, thin film transistors and OLEDs, and silicon nanostructures. To ASU, “the future lies in bringing together organic and biological molecules”-and so the university brings together the experts who study and make them.

The key efforts toward this vision are the Biodesign Institute and the Arizona Institute for Nano-Electronics (AINE): Traditional tools in nanoelectronics and nanoscale analysis combine with expertise in surface, bioconjugate, and organic chemistry. The Biodesign Institute joins these strengths with expertise in bioelectronics, biosensors, and nano-medicine; it incorporates the Center for Applied NanoBioscience, a facility for nanomanufacturing and prototyping.

AINE is a coordinated network of research centers focused on nanoelectronics, including nanophotonics, molecular electronics, nanoionics, and computational nanoscience. AINE’s goal is to strongly impact future technology areas related to ultra-low power/ultra-high speed electronics, and hybrid biomolecular electronics at the interface between the biological and electronics worlds.

In our survey, ASU reported the greatest number of MEMS patents (30) awarded in 2006 to any university.

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University of Washington

The research enterprise of the University of Washington (UW) includes top-ranked interdisciplinary programs that span engineering and the physical and biomedical sciences. Over the past 10 years, UW built on these strengths and positioned itself as a leader in micro- and nano research, education, and technology transfer.

In 2001, the UW launched its first Ph.D. program in nanotechnology. Successful completion of the program leads to a dual Ph.D. degree in nanotechnology and a traditional science, engineering, or medicine discipline. Thirty-three students have earned such a Ph.D. since 2001, and 48 are currently enrolled. Established through a $2.7 million NSF award, the program was renewed by the NSF and NIH-NCI at the level of $3.2 million for the 2005-to-2010 period.

Including these doctoral students, more than 600 graduate students, 350 undergrads, and 100 faculty members are engaged in micro/nano research at the UW; their projects involve researchers from bioengineering, biochemistry, physiology, and biophysics; molecular and cellular biology; engineering; chemistry; oceanography; medicine; and more.

Many of the UW’s nanoscale research and educational programs are coordinated through its Center for Nanotechnology (CNT). CNT has actively partnered with North Seattle Community College (NSCC) to develop a new two-year associate degree in nanotechnology.

The university’s NanoTech User Facility (NTUF) was established in 1998; in 2004, it became one of 13 nodes in the U.S. National Nanotechnology Infrastructure Network.

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North Carolina State University

To coordinate North Carolina State University’s (NCSU) expanding efforts in micro- and nanotechnology, the school is developing a Nanotechnology Institute that will foster interactions among university researchers and enhance nanotechnology education and outreach.

NCSU’s micro- and nanotechnology efforts made impressive advancements during fiscal year 2006. Researchers received eight micro- and 26 nanotechnology patents, as well as 81 intellectual property licenses.

The university is notable for its outreach to industry; NCSU facilities were shared with more than 200 companies last year.

NCSU is actively developing academic programs related to nanotechnology. The Chemical and Biomolecular Engineering Department offers a nanotechnology option for B.S. students. Approximately 700 graduate and undergraduate students learn about the subject through courses in various fields: physics, chemistry, engineering, agriculture, education, medicine, and business. For instance, NCSU’s College of Engineering (COE) actively collaborates with the College of Textile’s Nonwovens Cooperative Research Center to address emerging issues in nano fibers and related textile-based technology. And COE researchers in nanomaterials are collaborating with researchers at the College of Agriculture and Life Sciences and College of Veterinary Medicine to address issues in nanomaterials toxicology.

At the College of Education, researchers are producing nanoscience instructional materials for K-12 teachers and students.

NCSU is a participant in the National Nanotechnology Infrastructure Network.

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University of Maryland

The University of Maryland’s physics and materials community has achieved recognition by exploiting scanning surface nanoprobes for science and developing derivatives of the scanning tunneling microscope (and commercializing some). The university’s Materials Research and Engineering Center (MRSEC) and Center for Superconductivity Research Center have partnered to develop expertise in complex nanomaterial systems. Combinatorial approaches to nanomaterials engineering and discovery have become a strength.

Having made a strategic investment in MEMS research, Maryland now has a strong position in the micro arena. More recently the university assembled a team of leaders in various approaches to nanoparticle synthesis, which supports work in intelligent drug delivery, nanocatalysts, nanosystems assembly, and organics-based electronics. These areas enable the school to add biotech strength in partnership with other institutions.

Across the board Maryland is emphasizing the key issues of nanomanufacturing, in concert with NIST and including its new Center for Nanoscale Science and Technology (CNST).

The University of Maryland is located near the largest assortment of federal laboratories in the country, and most faculty members collaborate with one or more. The university boasts major new facilities and seeks to recruit 25 new nanotechnology faculty over the next few years.

In Small Times’ survey, the University of Maryland ranked second only to Cornell in terms of undergraduates focused on MEMS or nanotechnology.

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Rice University

Rice is known for its Richard E. Smalley Institute for Nanoscale Science and Technology, which encompasses the NSF-funded NSEC, Center for Biological and Environmental Nanotechnology (CBEN), the Carbon Nanotechnology Laboratory (CNL), and the Shared Equipment Authority (SEA), and shares support for the Laboratory for Nanophotonics (LANP).

Rice’s strengths include nanotechnology for energy and for health, nanomaterials, carbon nanotubes, computational nanotechnology, nanotechnology for electronics and for photonics, environmental and toxicological nanotechnology, and issues in society, ethics, and economics. With 120 faculty and research faculty across 16 departments as members of the Smalley Institute, Rice guesses it has someone working in every subfield of nano.

Rice also aims to broaden public understanding of nanotechnology and its potential-for instance to children through the NanoKids initiative and to public and corporate audiences with specifically designed courses in the School of Continuing Studies.

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Rutgers University

The Institute for Advanced Materials, Devices and Nanotechnology (IAMDN) leads nanoscience and technology research and development at Rutgers. It acts as an oversight organization, helping to coordinate interdisciplinary research, technology transfer, incubation, funding, and education.

IAMDN includes about 100 faculty and their research groups. Rutgers estimates the nano-related facilities used by the IAMDN faculty are worth $100 million; a new building-planned to open in three years-will consolidate the facilities and interaction among faculty members. This year, however, Rutgers is focused on new faculty hires and recently signed on a permanent director for the IAMDN.

The IAMDN has begun coordinating access to the many shared facilities in a dozen centers and laboratories, including the Micro Electronics Research Lab cleanroom and nanofabrication facilities.

Extensive incubator space is located near campus. The Rutgers technology transfer office works to quickly move ideas from research to prototype development.

Nine departments offer micro- and nanotechnology classes. Eight courses focus almost exclusively on nanoscience and technology, and another several dozen have a significant nano component. Rutgers awards degrees with concentration in nanomaterials and nanotechnology, and all electrical engineering degrees include the option of a specialty in micro- and nanoelectronics.

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Stanford University

While Stanford does not award micro or nano-specific degrees, minors, or emphases, the university is a leader in small tech as evidenced by the publication of 65 papers in nanotechnology and 37 in microtechnology during the 2006 school year. Stanford says it is committed to supporting the use of micro- and nanotechnologies in non-traditional research applications.

Last year, Stanford received a five-year, $20 million award from the National Cancer Institute to develop nanotechnologies for detecting and treating cancer. In 2005, it opened the Stanford Nanocharacterization Laboratory (SNL), whose mission is to provide high-quality, useful materials characterization data and insight for as wide a range of users as possible.

The Stanford Nanofabrication Facility (SNF) is a shared-equipment, open-use, device fabrication cleanroom. It facilitates the work of researchers from a wide variety of disciplines, such as optics, MEMS, biology, and chemistry, as well as process characterization and fabrication of more-traditional electronics devices. The SNF is supported by the NSF through the National Nanotechnology Infrastructure Network (NNIN).

Stanford is a leader in small-tech commercialization.

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University of California at Los Angeles

UCLA combines its MEMS and microsystems’ expertise with a number of nano-related centers. The university’s California NanoSystems Institute (CNSI) brings together researchers from the sciences, engineering, and medicine faculty to explore the use of nanotechnology to advance information technology, energy production, storage and saving, environmental well-being and diagnosis, and disease prevention and treatment.

To support the research, the $149 million, newly constructed CNSI building provides three floors of core facilities, including both wet and dry laboratories, and imaging and measurement equipment, high-throughput robotics, and class 100 and 1000 cleanrooms.

The Center on Functional Engineered Nano Architectonics (FENA) explores nanotechnology for information processing systems. The Western Institute of Nanoelectronics (WIN) develops advanced research devices, circuits, and nanosystems to exploit the spin property of electrons.

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University of Pittsburgh

Pitt’s strength in nanoscience is in the study of nanostructures at the core “essentially nano” level. The university’s Petersen Institute of NanoScience and Engineering aims to solve large, complex scientific and engineering challenges in nanoscience and engineering by facilitating interdisciplinary teams. The Institute comprises more than 50 faculty who form teams for various research topics, covering nanomaterials, devices/systems, and nano-instrumentation. During fiscal year 2006, the institute added nine new nanotechnology faculty.

Pitt’s NanoScale Fabrication and Characterization Facility (NFCF) is a user facility with 4,000 sq. ft. of cleanroom space, and advanced equipment with core nano-level (10nm or below) capability. This facility also enables vertical integration of structures from nano to micro and macro level in conjunction with the facilities existing on campus for micro- and macroscale structures and packaging.

Pitt has ranked the sixth among the U.S. universities in creating spin-off companies-including three in nanotechnology. Pitt offers a certificate in photonics.

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Purdue University

Purdue says that the strength of its nanotechnology research and its Birck Nanotechnology Center begins with people. Since 2002, Purdue has hired 16 faculty in various areas of nanotechnology. Faculty membership in the Birck Nanotechnology Center, a shared-use facility, is currently 146, representing 36 departments.

The design of the Birck building follows that of the NIST Advanced Measurement Laboratory in Maryland for the general nanoscale research labs. It boasts low-vibration assets, including a metrology laboratory with NIST-A1 floating mass floor (within a EMI shielded room that is temperature stable to ±0.01°C). The 25,000-sq.-ft. semiconductor nanofabrication cleanroom operates at classes 1, 10, and 100, and the integrated 2,500 sq. ft. bio-pharma cleanroom has separate airflow and personnel gowning. An airlock glove box that allows materials and devices to move between these two cleanroom spaces is the first such arrangement in the nation. The 60Hz electromagnetic fields from building power distribution are below 0.01 milligauss in selected labs and below 0.1 milligauss generally.

More than 350 educational resources-including seminars, tutorials, podcasts, and online nanotechnology simulation tools-are available through nanoHUB, a project of the Purdue-lead Network for Computational Nanotechnology.

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University of Louisville

The University of Louisville says the strength of its micro/nano centers lies in the breadth and depth of the processes and services they offer. Over the past 10 years, the university has built collection of multi-user core facilities to serve most disciplines of small-tech research and education, from nanoscale material synthesis to application-specific device prototyping.

The university’s Micro/Nano Technology Cleanroom provides fabrication and design services for numerous MEMS, microelectronic, and nanotechnology applications. The center is housed within two on-campus cleanrooms, the newest of which is a 10,000-sq.-ft., seven-bay, Class 100 facility equipped with $10 million of fabrication and characterization tools. Complementary to the cleanroom are additional dedicated multi-user core facilities for modeling, packaging, and testing.

U of L’s B.S., M.S., and Ph.D. degrees in electrical, mechanical, and chemical engineering-as well as chemistry-all allow a small-tech emphasis (as do its B.S. and M.S. degrees in bioengineering and physics).

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Louisiana Tech

Louisiana Tech offers several small-tech-specific degrees-more than any other university participating in the survey, save for the University at Albany-SUNY. The degrees include a B.S. in Nanosystems Engineering, an M.S. in Microsystems Engineering, an M.S. in Molecular Science and Nanotechnology, and a Ph.D. in Computational Analysis and Modeling. In addition, all undergraduate engineering degrees allow emphasis in micro/nanosystems, as do Ph.D. degrees in engineering and biomedical engineering.

Louisiana Tech’s Institute for Micromanufacturing (IfM) started more than 15 years ago with a micromanufacturing emphasis. Now, its expanded research and educational efforts cover five main areas: nanotechnology, biotechnology, biomedical nanotechnology, environmental technology, and information technology. The activities carried out through these areas, coupled with the institute’s integrated nanomanufacturing and micromanufacturing resources, have led to the realization of a broad range of research, educational, and commercialization efforts. The institute’s vision is to be a world class resource for the realization of commercially viable micro and nanosystems.

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University of Minnesota

The University of Minnesota has a history of strength in the area of novel materials, especially in recent years in nanostructured materials. This has led to the development of facilities for synthesizing and characterizing novel nanostructures. The U of M boasts a well-equipped materials characterization lab; together with the NanoFabrication Center and the Particle Technology Lab, it comprises one of 13 nodes in the National Nanotechnology Infrastructure Network.

Recently the university founded the Center for Nanostructure Applications, a resource for seeding ideas related to the development of novel active nanodevices based on these nanostructured materials. This multidisciplinary effort crosses boundaries among science, engineering, medicine, energy, and systems to capitalize on the possibilities presented by this new class of materials.

The university offers a Nano Particles Science & Engineering minor (M.S.).

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Rensselaer Polytechnic Institute

Rensselaer provides leadership in the areas of hyper integration, integrated circuit (IC) back-end technology, functional nanobuilding blocks, multi-scale modeling, and packaging science. The university’s areas of expertise also include wearable electronics, solid-state lighting, tissue engineering, and bioreactors.

At the core of RPI’s small-tech efforts is the Rensselaer Nanotechnology Center, which provides interdisciplinary research programs and focuses on creating novel materials and devices.

The NSF-funded Nanoscale Science and Engineering Center for Directed Assembly of Nanostructures was founded in September 2001 at RPI, the University of Illinois at Urbana-Champaign, and Los Alamos National Laboratory. It addresses the fundamental scientific issues underlying the design and synthesis of nanostructured materials, assemblies, and devices with dramatically improved capabilities for many industrial and biomedical applications.

Research at the Center for Integrated Electronics is facilitated by Rensselaer’s recently upgraded 10,000-sq.-ft. Class 100 microfabrication cleanroom, which supports three-, five-, and eight-inch wafer fabrication technology.

Recently, RPI announced a $100 million partnership with IBM and New York to create the Computational Center for Nanotechnology Innovations-the world’s most powerful university-based (and a global top 10) supercomputing center. Based on the RPI campus and at its Rensselaer Technology Park in Troy, N.Y., the CCNI will focus on reducing the time and costs associated with designing and manufacturing nanoscale materials, devices, and systems. This center promises to be an important resource for industry.

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Editor’s note: The following universities were chosen by survey respondents as outstanding for their work in micro- and/or nanotechnology. Some did not complete the Small Times’ survey, however, and therefore did not qualify for non-peer rankings.

Massachusetts Institute of Technology

“Tiny Technologies” is an umbrella term MIT uses for a number of related areas of research in nano- and micro-scale technologies. Opportunities for study in this area are primarily at the graduate level and in the departments of Materials Science and Engineering, Electrical Engineering and Computer Science, or Chemical Engineering. Graduate students often arrange to study within one of the MIT laboratories to conduct research.

MIT’s major micro- and nano centers are the Microsystems Technology Laboratories, which provide microelectronics fabrication laboratories, including cleanrooms and design and testing facilities; the U.S. Army Institute for Soldier Nanotechnologies, which supports bottom-up nanotech research; the Center for Material Science and Engineering, which provides advanced materials characterization tools; and the Microphotonics Center.

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University of California at Berkeley

UC Berkeley addresses both micro- and nanotechnology. The university has identified nanoscale science and engineering as a top priority and has allocated seven new faculty positions for the Berkeley Nanosciences and Nanoengineering Institute (BNNI), which was established to expand and coordinate research and educational activities in nanoscale science and engineering. This is in addition to the significant number of new faculty in nanoscale science and engineering that are being recruited by departments. UC Berkeley currently has more than 90 faculty with active research programs in nanoscale science and engineering. The university has a close partnership with Lawrence Berkeley National Laboratory, which is also investing heavily in nanoscience though user facilities such as the Molecular Foundry.

The Berkeley Sensor & Actuator Center (BSAC) is the National Science Foundation Industry/University Cooperative Research Center for microsensors and microactuators. The center’s mission is to conduct industry-relevant, interdisciplinary research on micro- and nanoscale sensors, moving mechanical elements, microfluidics, materials, and processes that take advantage of progress made in integrated-circuit, bio, and polymer technologies.

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Northwestern University

Northwestern established its Institute for Nanotechnology as an umbrella organization to support meaningful efforts in nanotechnology, house state-of-the-art nanomaterials characterization facilities, and nucleate individual and group efforts aimed at addressing and solving key problems in nanotechnology.

The Center for Nanofabrication and Molecular Self-Assembly, a $34 million, 40,000-sq.-ft. facility that was anchored by a $14 million grant from the Department of Health and Human Services, is one of the first federally funded facilities of its kind in the U.S. and home to the institute’s headquarters.

The multi-million-dollar interdisciplinary nanotechnology research efforts carried out in the Institute of Nanotechnology are supported by grants from government as well as from many industrial and philanthropic organizations.

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Georgia Institute of Technology

Georgia Tech won a National Science Foundation (NSF) grant in 1995 to open its Microelectronics Research Center. Today, construction is underway for Georgia Tech’s Nanotechnology Research Center, expected to open in 2008. The 160,000-sq.-ft. center promises to be one of the most sophisticated facilities in the country with 30,000 sq. ft. of cleanroom spaces that support research and instruction in microelectronics, semiconductors, materials, medicine, and pharmaceuticals.

In the meantime, the Center for Computational Materials Science in the School of Physics offers computer simulation and other tools to support research projects in nanotechnology and other fields. And the Georgia Tech Center for Nanostructure Characterization and Fabrication (CNCF) in the School of Materials Science and Engineering offers multi-user nanoscience and nanotechnology research services. Its mission is to provide state-of-the-art nanostructure tools for performing advanced research on a variety of materials.

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Harvard University

Harvard’s Center for Nanoscale Systems (CNS) focuses on how nanoscale components can be integrated into large and complex interacting systems. CNS is a member of the NSF’s National Nanotechnology Infrastructure Network (NNIN) initiative to create a national network of world-class facilities available to all researchers.

Other centers at Harvard include the Materials Research Science and Engineering Center (MRSEC), an NSF-funded project focused on interdisciplinary research whose participants represent five departments. The Nanoscale Science and Engineering Center (NSEC) is an NSF-funded collaboration among Harvard, along with other universities worldwide, national labs, and the Museum of Science, Boston.

When the National Cancer Institute awarded $26.3 million to establish seven Centers of Cancer Nanotechnology Excellence in 2005 (as part of its $144.3 million five-year initiative for nanotechnology in cancer research), awardees included the MIT-Harvard Center of Cancer Nanotechnology Excellence, with Harvard’s Ralph Weissleder, M.D., Ph.D., as a principal investigator.

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California Institute of Technology

Caltech hosted the speech by heralded physicist Richard Feynman that envisioned the progress in nanotechnology we are now beginning to realize-and also hosted the unveiling of the National Nanotechnology Initiative in 2001.

Funded by the Gordon and Betty Moore Foundation and the Kavli Foundation, Caltech supports a long-term program of innovative research in nanoscale science and engineering through the Kavli Nanoscience Institute. It emphasizes efforts that transcend traditional disciplinary boundaries, with two principal areas of focus: nanobiotechnology and nanophotonics. The institute’s common methodology in these areas is large-scale integration of nanoscale devices-that is, going beyond the present nanoscience of individual structures to realize interacting systems.

The university’s Microfluidic Foundry provides multi-layer soft lithography fabrication services

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Carnegie Mellon University

Carnegie Mellon’s new Center for Nano-enabled Device and Energy Technologies (CNXT) aims to harness diverse nanometer-scale science and engineering work to help solve a few contemporary problems such as energy supply, environmental management, and terrorism. The center draws on expertise from various departments in engineering and science. The overarching goal of these activities is to enable the design of innovative systems. The unifying theme of the center is nanometer-scale materials that are deliberately synthesized, self-assembled, assisted to self-assemble, or structured by engineering know-how to create novel properties, processes, or principles. The current focus of the center is on nano-enabled sensor and energy technologies. Its secondary focus is nano-enabled information technologies, including devices and subsystems for electronic and photonic information manipulation.

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University of California-Santa Barbara

The University of California-Santa Barbara is a recognized leader in materials science, optoelectronic and electronic device research, and nanofabrication. Nanotech, UCSB’s nanofabrication facility, is located in the university’s new Engineering Sciences building and is part of the National Nanotechnology Infrastructure Network. It offers 12,700 sq. ft. of Class 100 and Class 1000 cleanroom space and a broad range of tools to support device fabrication for a variety of materials, including InP, GaAs, GaN, SiC, Si, and more.

UCSB partners with UCLA in the California NanoSystems Institute and in the Center for Nanoscience Innovation for Defense. UCSB’s Center for Nanotechnology in Society aims to serve as a national research and education center, a network hub for those concerned with nanotechnologies’ societal impacts, and a resource base for studying those impacts. The UCSB also features a Materials Research Laboratory, which is supported by the NSF.

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Nanoscale materials raise questions where toxicity is concerned

By Chuck Berndt, Communications Vice President, IEST

The safety (toxicity) of nanoscale materials is largely an unknown. This is a significant knowledge void that should be considered and rectified. This includes exposure, dose, absorbency, absorbency rate, and what happens at the molecular/cellular level-namely, toxicity, mutagenicity, carcinogenicity, teratogenicity, metabolic anomalies, and so forth.

According to the National Toxicology Program (NTP), established by the Department of Health and Human Services’ Nanotechnology Safety Initiative, Nanotechnology is defined by the National Nanotechnology Initiative (NNI) as “‘the understanding and control of matter at dimensions of roughly 1 to 100 nanometers, where unique phenomena enable novel applications.’ These materials can, in theory, be engineered from nearly any chemical substance; semiconductor nanocrystals, organic dendrimers, and carbon fullerenes and carbon nanotubes are a few of the many examples. Nanoscale materials are already appearing in commerce as industrial and consumer products and as novel drug delivery formulations. Commercial applications and resultant opportunities for human exposure may differ substantially for ‘nanoscale’ compared with ‘bulk’ materials.”1,2

The NTP goes on to point out that “there is very little research focus on the potential toxicity of manufactured nanoscale materials,” suggesting the possibility that the very diverse properties of nanoscale materials indicate that their toxicological characteristics may be different from those materials with similar composition but larger dimensions.

What is toxicology?

The study of poisons is known as toxicology. In other words, toxicology is the study of the adverse effects of chemical, physical, or biological agents on living organisms and the ecosystem, including the prevention and amelioration of such adverse effects. It is the study of the adverse effects of chemicals on living organisms, including the study of symptoms, mechanisms, treatments, and detection of poisoning, especially the poisoning of people. The chief criterion regarding the toxicity of a chemical is the dose, i.e., the amount of exposure to the substance. Almost all substances can be toxic under the right conditions.

Many substances regarded as poisons are toxic only indirectly. An example is “wood alcohol,” or methanol, which is chemically converted to formaldehyde and formic acid in the liver. It is the formaldehyde and formic acid that cause the toxic effects of methanol exposure. Many drug molecules are made toxic in the liver; a good example is acetaminophen, especially in the presence of alcohol. The genetic variability of certain liver enzymes makes the toxicity of many compounds differ between one individual and the next. Because demands placed on one liver enzyme can induce activity in another, many molecules become toxic only in combination with others. A family of activities that engages many toxicologists includes identifying which liver enzymes convert a molecule into a poison, what are the toxic products of the conversion, and under what conditions and in which individuals this conversion takes place.

The term LD50 refers to the dose of a toxic substance that kills 50 percent of a test population (typically rats or other surrogates when the test concerns human toxicity). LD50 estimations in animals became obsolete in 1991 and are no longer required for regulatory submissions as a part of a pre-clinical development package.

Toxicity

Toxicity may be defined as (1) the quality or condition of being toxic; (2) the degree to which a substance is toxic; and (3) a measure of the degree to which something is toxic or poisonous. Toxicity can refer to the effect on a whole organism (such as a human, a bacterium, or a plant), or to a substructure (such as the liver). By extension, the word may be metaphorically used to describe toxic effects on larger and more complex groups, such as the family unit or “society at large.”

In the science of toxicology, the subject of such study is the effect of an external substance or condition and its deleterious effects on living things, i.e., organisms, organ systems, individual organs, tissues, cells, and subcellular units. A central concept of toxicology is that effects are dose dependent. Even water is toxic to a human in large enough doses, whereas for even a very toxic substance such as snake venom, there is a dose for which there is no toxic effect detectable.

There are generally three types of toxic entities: chemical, biological, and physical.

  • Chemicals include both inorganic substances such as lead, hydrofluoric acid, and chlorine gas, as well as organic compounds such as ethyl alcohol, most medications, and poisons from living things.
  • Biological toxicity can be more complicated to measure because the “threshold dose” may be a single organism, as theoretically a single virus, bacterium, or worm can reproduce to cause a serious infection. However, in a host with an intact immune system, the inherent toxicity of the organism is balanced by the host’s ability to fight back; the effective toxicity is then a combination of both parts of the relationship. A similar situation is also present with other types of toxic agents. In particular, toxicity of cancer-causing agents is problematic, since for many such substances it is not certain if there is a minimal effective dose or whether the risk is just too small to see; here, too, the possibility exists that a single cell transformed into a cancer cell is all it takes to develop the full effect. Mixtures of chemicals are more difficult to assess in terms of toxicity, such as gasoline, cigarette smoke, or industrial waste. Even more complex are situations with more than one type of toxic entity, such as the discharge from a malfunctioning sewage treatment plant, featuring both chemical and biological agents.
  • Physically toxic entities include things not usually thought of as such by the lay person: direct blows; concussion; sound and vibration; heat and cold; non-ionizing electromagnetic radiation, such as infrared and visible light; ionizing non-particulate radiation, such as x-rays and gamma rays; and particulate radiation, such as alpha rays, beta rays, and cosmic rays.

Toxicity can be measured by the effects on the target (organism, organ, or tissue). Because individuals typically have different levels of response to the same dose of a toxin, a population-level measure of toxicity is often used that relates the probability of an outcome for a given individual in a population (e.g., the LD50). When such data does not exist, estimates are made by comparison to known similar toxic things or to similar exposures in similar organisms. Then ”safety factors“ must be built in to protect against the uncertainties of such comparisons in order to improve protection against these unknowns.

Factors influencing toxicity

Toxicity of a substance can be affected by many different factors, such as the pathway of administration (is the toxin applied to the skin, ingested, inhaled, injected), the time of exposure (a brief encounter or long term), the number of exposures (a single dose or multiple doses over time), the physical form of the toxin (solid, liquid, gas), the genetic makeup of an individual, an individual’s overall health, and many others. Several of the terms used to describe these factors have been included here.

  • Acute exposure: a single exposure to a toxic substance that may result in severe biological harm or death; acute exposures are usually characterized as lasting no longer than a day
  • Chronic exposure: continuous exposure to a toxin over an extended period of time, often measured in months or years

What is needed to address these concerns?

In recognition of this knowledge void, the NTP has formed an initiative to address the potential human health hazards associated with the fabrication and use of nanoscale materials. The research program was founded with the aim of investigating and evaluating the “toxicological properties of major nanoscale materials classes which represent a cross-section of composition, size, surface coatings, and physicochemical properties, and use these as model systems to investigate fundamental questions concerning if and how nanoscale materials can interact with biological systems.”2

The President’s Council of Advisors on Science and Technology submitted its assessment and recommendations on nanotechnology toxicology research via the National Nanotechnology Advisory Panel (NNAP) in 2005: “The National Nanotechnology Initiative (NNI) is funding research within several agencies to develop a broad understanding of the environmental and health effects of nanotechnology, in particular those nanomaterials that show the most promise for commercial use. The NNAP draws special attention to the ongoing research by the [NTP] to determine the toxicity of specific nanomaterials, and by the National Institute for Occupational Safety and Health to ensure worker safety.”3

The document goes on to delineate the planned budget allocations for research and development into the potential health and environmental risks of nanotechnology, as well as detail other government and organizational efforts engaged in researching the use of nanoparticles. For example, NNAP enlisted the Science and Technology Policy Institute to conduct a survey of National Institutes of Health (NIH)-funded nanotechnology research projects. To move forward with enlarging the body of knowledge necessary to set standards and develop guidelines and regulations related to nanotechnology manufacture, the NNAP established the Nanotechnology Environmental and Health Implications Working Group under the NSET Subcommittee, explaining that “[the] working group has enabled exchange of information among research and regulatory agencies and has brought together a group that can both identify the research needed in support of regulatory decision-making and implement those priorities into the R&D program.”3

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Charles W. Berndt is the principal in C. W. Berndt Associates (Highland Park, IL), which provides advisory services associated with human-sourced contamination control. He spent eight years as group manager of the Araclean Division of ARA/Aratex Services (now known as ARAMARK Cleanroom Services). He serves on the Editorial Advisory Board of CleanRooms magazine, chairs the Editorial Board of the peer-reviewed Journal of the IEST, is communications vice president of IEST, and serves on IEST’s Executive Board. He chaired Working Group CC003 during the development of IEST-RP-003.3.

About IEST

IEST is an international technical society of engineers, scientists, and educators that serves its members and the industries they represent (simulating, testing, controlling, and teaching the environments of earth and space) through education and the development of recommended practices and standards. IEST is the Secretariat of ISO/TC 209, Cleanrooms and associated controlled environments, charged with writing a family of international cleanroom standards. IEST is also an ANSI-accredited standards-development organization. For more information, contact IEST at [email protected] or visit the IEST web site at www.iest.org.

References

  1. http://ntp.niehs.nih.gov/index.cfm?objectid=720163E9-BDB7-CEBA-FB0157221EB4375F.
  2. For questions or additional information, contact: Dr. Nigel Walker, NIEHS/NIH, P.O. Box 12233, MD EC-34, 79 T.W. Alexander Dr., Research Triangle Park, NC 27709.
  3. The National Nanotechnology Initiative at Five Years: Assessment and Recommendations of the National Nanotechnology Advisory Panel (NNAP), Chapter 3, Sec. 1, Environmental, Health, and Safety, submitted by the President’s Council of Advisors on Science and Technology, May 2005.

BY GAIL FLOWER, Editor-in-Chief

In the March 2007 cover story, we asked the industry about the demands that new packages placed on sockets, lead-free issues, standards, cost control, fine pitch, and the overall consensus on the Burn-in & Test Sockets Workshop (BiTS) where users talk to suppliers. Part II covers sockets as an industry, thermal issues affecting sockets, measuring burn-in socket life, and perplexing technology issues surrounding sockets.

Socket Industry Forecasts

How is the socket industry doing overall?

The industry is tending to merge a bit. According to Jamie Andes of Synergetix, there are, and will continue to be, mergers and a reduction of players in the burn-in and production test socket area. Valts Treibergs of Everett Charles Technologies (ECT) added that mergers, acquisitions, name changes, and growth will continue for sockets. The only certainty is change.

At Antares Advanced Test Technologies – formed by acquisitions of WELLS-CTI in 2003, DB Design and ACI in 2005, and merging with Antares conTech (a spin-off of Kulicke & Soffa) – change has been quite significant. Mark Murdza, director of marketing, Antares, adds that the industry is strong and changes will continue, especially consolidation in the burn-in and socket realm. Reasons for consolidation abound. Anyone can make a spring-probe test socket, but suppliers with value-added variables that customers need will survive. The need for alternative solutions to test next-generation devices with higher speed and power is another reason for innovative interconnect technologies. Many companies cannot afford the R&D expenses needed to generate these solutions; it takes horsepower in global markets. A socket supplier must be able to service and support the business anywhere in the world where a customer’s production requires it. Thus mergers and acquisitions make sense in today’s economy.

Though some see change, others reply that the burn-in market, after year 2000, has remained more or less constant. Franz Rosenberger of Yamaichi Electronics explained that significant continuous growth cannot be expected because products have built-in self test (BIST) more often, and the functionality is guaranteed by process control.


Figure 1. A liquid-cooled spring-loaded heatsink. (Photo courtesy of Gryphics, Inc.)
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Bob Fenton of Gold Technologies, Inc., mentioned that his company has a significant OEM business outside of the semiconductor arena that, beginning in 2005, helped them out in terms of revenue. The semiconductor test area has been profitable with incremental growth for Gold in 2005 and 2006. Fenton sees some indications of a slowdown in their Tier I semiconductor customers, though orders have remained the same as in the fall 2006, and are improving incrementally.

Markets adjust over time and many socket suppliers sell products outside the “normal” range. Therefore, making a blanket statement is not as useful as knowing the capabilities and strengths of each company within the industry.

Thermal Issues

How do sockets handle rising thermal issues?

Thermal management of a BGA socket involves material selection, design, analysis, optimization, and verification of a cooling system for producing reliable sockets for testing high-power devices according to an expert at Ironwood Electronics, Inc. These include thermal interface material (grease, silicon pad), heatsinks made of finned aluminum on the IC’s copper spreader, and other elements to control rising temperatures.

Steven Bozsi of Bozsi Engineering notes that there seems to be a trend toward higher current capability while still requiring ever-higher pin counts. Some manufacturers use a variety of different types of pins in the same socket based on current and temperature requirements.

Fenton reports that Gold takes the same approach to rising thermal issues as to other challenges, combining new materials and engineering sets with testing and validation. Many of these issues are due to increased current density and testing methodologies. For example, the move to array or strip testing, and the use of conductive thermal conditioning in strip-test handlers, has been a thermal challenge their firm overcame just last year. For a device with many I/Os to surface area, such as a BGA or LGA, if you do nothing but build a standard socket, the handler will not keep the DUT at temperature without an unacceptably long soaking time. They solved the problem by adding supplemental heating or cooling as needed to the socket.


Figures 2a & b. Crown-tipped probes working with oxidized material must be inspected and cleaned for optimized effectiveness. (Photo courtesy Nu Signal LLC)
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Most burn-in suppliers report some form of heat control. Rachel Lufkin of Aries Electronics explains that their burn-in socket material is plastic with high thermal characteristics, and that heatsinks are also added if required. Yamaichi has active- and passive-cooled socket systems, some with each device individually sourced and controlled. And, of course, heatsinks are included where needed. Antares also reports that customers can individually control device temperatures during burn-in using their existing burn-in equipment. The company offers high-power device thermal control products in test applications from benchtop through production. Heatsinks are used more with the advent of finer architectures, increased current leakage, and higher power densities. Therefore customers may require more control than is offered by standard passive heatsinks.

Knowing what each application requires dictates the approach a socket supplier takes to handling increased heat. ECT uses an advanced modeling and thermal simulation tool as well as lab testing to measure socket performance at temperature and high-current extremes. Working closely with the customer to specify and provide passive and active thermal manual actuators for sockets, as well as provide thermal flow channels with sockets, helps stabilize temperature.

Jim Rathburn of Gryphics, Inc., says that his company has a selection of heatsink styles: CAM-actuated spring-loaded passives, some with fans, and many other configurations (Figure 1). In the user arena, Frank Navarret of National Semi Corp. uses heatsinks for high-rel devices.

Materials, such as Honeywell’s burn-in thermal interface material (TIM), are used to maintain thermal performance for more than 1,000 cycles. More often than ever, materials, heatsinks, and new designs take the heat.

Measuring Burn-in Socket Life

How do you measure burn-in socket life?

Measuring the life of a burn-in socket depends on the customer’s specific usage and requirements. Rosenberger says that Yamaichi’s sockets are designed to be rigid mechanically and that end-life can be predicted by electrical behavior, which is influenced by temperature, contact alloy, and usage.

The real issue with burn-in is not the socket life but the cost of burn-in, says Roger Weiss, Ph.D., president and CEO of Paricon Technologies, Corp. Several device manufacturers are transitioning to strip burn-in, which reduces cost on several fronts: the number of components per test board can grow to as many as 800. This reduces cost of board, energy, and unit socket. Net/net, the strip burn-in may reduce the cost of burn-in by a factor of as much as 10×.

At CVInc., Terence Collier uses a tool that the company developed to supply electrical load and heat to simulate what an individual pin will encounter. From this data he estimates the life of a given design. CVinc. also takes customers’ sockets and runs simulation to estimate the life or time between preventive maintenance (PM). That data can be generated on a single pin or an entire socket. CVInc. runs failure analysis (F/A) on a socket to determine if the socket is the cause of poor yield. The socket is placed in the test fixture to toggle target pins and from that generate a profile of good versus bad pins. One also needs to know the impact of sockets and probe contacts on the DUT, adds Collier. This information can be modeled, but it can also be gathered in real time to provide hard data.

Users keep track of burn-in life. At Micron they monitor yield per site and make decisions based on pre-selected criteria. At National Semi an inventory database keeps track of the amount of hours that burn-in uses. This is tracked once the boards are released and 100% verified prior to use.

ECT builds burn-in sockets if a customer specifically requests it. However, for test contactors, they have a regimented lab test qualification plan for new interconnect designs, using robotic flying probers, pneumatic cycling machines, high-current pulsing apparatus, and a host of RF measurement tools to qualify socket signal integrity.

Cycle times vary per manufacturer. Fenton says that, though his company doesn’t do burn-in, they specify burn-in sockets at 20,000 insertions or more and have never had an issue with the specification.


Figure 3. Strip testing for multiple devices increases efficiency. (Photo courtesy Paricon Technologies Corp.)
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Olek Cymbalski of OPC Technologies says that many companies supply his firm with high-end test sockets claiming more than 500,000 insertions. The sockets work well, but cost as much as 50× the average socket. They require extensive maintenance to remain at peak performance. Key elements of the technology are crown-shaped probe tips that make contact with the sides of the solder ball (Figure 2). Heavy spring force is used to displace oxidized surface layers and make good electrical contact. With regular preventive maintenance and cleaning, these sockets deliver a long service life.

Antares’ burn-in sockets go through a validation testing sequence to emulate the end-use application, and that is what they use to measure burn-in socket life. The objective is to validate the socket integrity through multiple burn-in cycles. Additionally, all burn-in sockets must withstand 10,000 mechanical cycles to be considered a reliable product, adds Murzda. Withstanding 10,000 cycles has become a de-facto industry standard.

Challenges in Technology

What are the most perplexing issues?

In this area, most participants in our survey tended to agree. The challenges today include: cost, high-densities, fine pitch, high power, lead-free, and thermal concerns. Advances in system performance, needs for high-speed memory, RF, wireless, and other applications drive demand for low-cost socket technologies that can deal with lead-free plating and low insertion loss, says Gryphics’ Rathburn. Tight tolerances and chips that don’t follow JEDEC standards add challenge, notes Aries’ Lufkin. Coming up with a design that eliminates the trade-offs between higher current-carrying capacity, low resistance, high frequency, greater contact travel, finer pitch, low inductance, low cost, and mass production is important, adds David Pfaff of Plastronics Socket Co.

Specifically, for engineers in the field, problems revolve around designing a reliable socket that can perform for an extended time at elevated temperatures. Trends seem to show these stress temperatures have been increasing to as much as 200°C and above, says Bozsi.

Weiss noted that the worlds of test and burn-in are coming together, with test being performed during burn-in. The speed of devices and contact pitch have moved beyond what has historically been economically feasible for conventional spring pin and formed contacts. This is compounded by the growing need to test components at actual performance. This must all be done while providing cost-effective solutions. These industry needs are the drivers for new technology.

The socket, board, and IC device must be optimized as an integrated assembly says Treibergs. To build a better socket that meets these needs, the designer and test engineer must come up with optimum spring loading for a given probe-tip geometry to determine the sweet spot for stable electrical contact. They must evaluate contact resistance (CRES), intermetallic formation at the probe tip impact, as well as contamination on the DUT pads, says Collier. Life testing is a must. Incoming inspection of assembled sockets must be done. And the impact of temperature on performance and components must be considered.

Conclusion

Sockets are vital to meeting the needs of future electronics. We thank the users and suppliers of burn-in test and production sockets for their participation in this survey. The better we understand what future technologies require, the more we can prepare to meet the needs of tomorrow.


ACKNOWLEDGEMENTS

The author would like to thank the following companies for their contributions to this article:

Advanced Interconnections Corp.
West Warwick, RI
www.advanced.com

Antares Advanced Test Technologies
Vancouver, WA
www.antares-att.com

Aries Electronics Inc.
Frenchtown, NJ
www.arieselec.com

Bozsi Engineering
Chandler, AZ
www.bozsi.com

CVinc.
Plano, TX
www.covinc.com

Everett Charles Technologies
St. Paul, MN
www.ectinfo.com

Gold Technologies, Inc.
San Jose, CA
www.goldtec.com

Gryphics, Inc.
Plymouth, MN
www.gryphics.com

Honeywell
Tempe, AZ
www.honeywell.com

IDI Synergetix
Kansas City, KS
www.synergetix.com

Ironwood Electronics
Burnsville, MN
www.ironwoodelectronics.com

Micron Technologies Inc.
Boise, ID
www.micron.com

National Semiconductor
Santa Clara, CA
www.national.com

Nu Signal
Phoenix, AZ
www.nusignal.com

OPC Technologies
Grass Valley, CA
www.national.com

Paricon
Fall River, MA
www.paricon-tech.com

Plastronics
Irving, TX
www.locknest.com

Yamaichi Electronics
San Jose, CA
www.yeu.com

Apr. 30, 2007 — The Institute of Electrical and Electronics Engineers (IEEE) has completed its Nanoelectronics Standards Roadmap, which establishes a framework for creating standards to help industry transition electronic applications based on nanotechnology from the laboratory to commercial use. The document is posted on the IEEE web site, and the association invites input from interested parties by e-mail. Deadline for comment is June 21, 2007.

The roadmap recommends the initiation of five nanoelectronic standards this year: three for nanomaterials involving conductive interconnects, organic sensor structures, and nano-dispersions; and two for nanodevices involving nanoscale sensors and nanoscale emitting devices. In addition, it targets the start of seven nanomaterial standards and five nano-device standards in 2008.

The IEEE Nanoelectronic Standards Roadmapping Initiative, which began in early 2003, is co-chaired by Evelyn Hirt of Battelle and John Tucker of Keithley Instruments. Its members come from industry, government and academia and from many nations. The roadmap focuses on standards for nanomaterials and devices that promise to yield the highest value in the near-term. It also anticipates standards likely to be needed at higher levels of integration for functional blocks and applications.

“The standards identified in the roadmap are intended to foster industry’s growth by enabling researchers to build on each other’s findings, harmonize best practices, and support manufacturers across the value chain from materials, processing and test equipment to subsystems and systems,” says Edward Rashba, Director, New Business Ventures.

“If the industry concurs with the choice of the five nanoelectronic standards the roadmap targets to start in 2007, we’ll begin work on them this summer or fall,” says Rashba. “These standards will build on the nanoelectronic standards efforts already underway or completed at the IEEE.”

In addition to email feedback, the IEEE plans to gather commentary via a “town-hall”-style meeting on May 22 at the NSTI Nanotech 2007 Conference in Santa Clara, Calif.

One nanoelectronics standard, IEEE 1650, “Standard Test Methods for Measurement of Electrical Properties of Carbon Nanotubes”, has already been completed. This document, the first of its kind, provides a common template for generating reproducible electrical data on nanotubes. The IEEE says that organizations worldwide have aligned their characterization methods with it.

A second standard, IEEE P1690, “Standard Methods for Characterization of Carbon Nanotubes Used as Additives in Bulk Materials” is underway.

Mirror plans to produce, sell, and license its wire-bonding technology by agreement with Liberty University (Lynchburg, VA), and will locate a facility in Irvine, CA. The proprietary Mirrored Pinout concept is based on clockwise wire bonding, opposite traditional wire-bonding designs. Performance benefits are suggested, as a mirrored-pinout package, mounted to a PCB with a standard package, creates shorter circuit routing, reportedly by up to 80%. Additional benefits include a smaller PCB or other substrate material.

(April 26, 2007) LIVERMORE, CA &#151 FormFactor, Inc., shipped a 26,000 pin-count wafer probe card, based on its PH150XP platform, to packaging and wafer-test house Tera Probe, Inc., for testing advanced DRAM wafers.

Apr. 25, 2007 — The Pennsylvania NanoMaterials Commercialization Center has announced its first round of funding for three commercialization projects in nanomaterials. The Center targets partnerships of researchers from universities, small companies, large companies and entrepreneurs, and funds projects that have commercial or defense applications.

The Center granted NanoRDC, LLC $51,250 to develop and commercialize a chemical method for functionalizing carbon nanotubes (CNTs). This initiative will enable CNTs to be more effectively dispersed in a wide range of polymers at lower cost. Polymers using these treated CNTs will have enhanced antistatic and electrical conductivity, resulting in the expanded use of new rubber and plastic materials for the automotive, electronics, aerospace and defense industries. Applications include electrostatic painted plastic parts, static dissipation products, thermally conductive components and EMI shielding products.

Illuminex Corporation was awarded $300,000 to commercialize device technologies that utilize nanowire arrays. These arrays will be incorporated into a new generation of heat pipes, which makes the heat pipes more efficient in removing heat from microprocessor chips used in computer servers and laptops. If successful, the new nanowire technology has the ability to enable the computer industry to solve the challenging problem of removing the higher heat loads generated by the new generation of faster computer microprocessors.

Plextronics Inc. was funded in the amount of $200,500 to further the development of Plexcore PV active layer technology for organic solar cells. Organic solar cells use extremely thin layers of plastic semiconductors, instead of silicon, to absorb light and create electricity. This initiative will focus on the development of a new generation of polymer-based semi-conductive inks, Plexcore PV, that increase solar conversion efficiency, while extending the lifetime of the device. Success will remove one of the remaining barriers to broad market commercialization and make organic solar cells an economically viable form of renewable energy.

In addition to the Center’s funding for the three projects totaling $551,750, the companies have added cash and in-kind matches totaling $460,600.

In September 2006, the Center requested pre-proposal white papers prior to the submission of formal proposals that resulted in 38 submissions statewide. All proposals in the final round were judged by the Center’s technical advisory committee.

The grants were made possible by funding from the Commonwealth of Pennsylvania and the U.S. Air Force.

A second round of projects will be funded in the early summer of 2007; full proposals are due June 15.

The company will use these proceeds to expand development, marketing and sales, and overall operations. Lamina’s proprietary packaging technology provides thermal management and interconnections to enable reliability and functionality with high-brightness, high-heat applications. Its TitanTurbo line of high-output LED light engines is comparable to traditional bulbs for household, office, retail, commercial, and exterior end-uses.

(April 25, 2007) NUREMBERG, Germany &#151 SMT/Hybrid/Packaging, April 24–26 in Nuremberg, hosts technical sessions, tutorials, exhibitions, live packaging demonstrations, and other events geared toward advanced applications in packaging and electronics assembly. Following are some highlights from the show.