Category Archives: LEDs

November 29, 2011 — OSRAM Opto Semiconductors introduced the Oslon Square LED for lighting applications, packaged enclosed in a reflective layer to boost light output.

The reflective package technology increases system efficiency, redirecting light from the side and back of the LED chip to the front. Light that is reflected back to the LED within a system, for example from a diffuser, can also be recycled in this way. At an operating current of 700mA, it achieves an efficiency of above 90lm/W and a luminous flux of 200lm and more. At 350mA, its efficiency exceeds the 100lm/W mark.

Also read: Thin-film chip boosts LED optical output without changing footprint

The Oslon Square is available in various versions and color temperatures, and can be operated with different currents. The Square measures 3 x 3mm, has thermal resistance of 3.8

November 28, 2011 — AKHAN Technologies has developed a shallow n-type diamond material over silicon that has characteristics such as a shallow ionization energy (250meV), high carrier mobility (>1000cm2/Vs in nanocrystalline diamond thin films), and no graphitic phases. The latter is important because graphitic films translate to low mobility (because of scattering sites). The material also provides for a 900A/mm2 current density at +2V forward bias in low voltage high current diode device applications.

In a detailed discussion about the technology in a podcast interview with ElectroIQ.com (below), Adam Khan, president of AKHAN Technologies, said that the bottleneck in development of diamond films has always been the fabrication of n-type diamond,

November 15, 2011 — Applied Materials Inc. (Nasdaq:AMAT) presented supplier awards to 4 companies for overall performance, and 1 for environmental improvements. The awards were given out at Applied’s 2011 Executive Supplier Forum.

Joseph Flanagan, senior vice president, Worldwide Operations and Supply Chain, called AMAT’s customer environment global, innovative, and market-adaptive. To serve them, he said, Applied needs excellent suppliers. Applied has more than 2,000 suppliers worldwide.

These companies were recognized for consistently meeting or exceeding Applied’s performance expectations:

  • Advanced Energy Industries, Inc.
  • Green, Tweed & Co.
  • Nihon Ceratec Co., Ltd.
  • Volpato Industrie S.p.A

Since 2006, Applied has reduced the energy consumed by its products by an average of 15%, and some products by as much as 35%. The 2011 Applied Materials Sustainability Award, for collaborating with Applied in improving the environmental performance of Applied Materials’ products, winner:

  • Pfeiffer Vacuum GmbH

Applied Materials, Inc. (Nasdaq:AMAT) provides innovative equipment, services and software to enable the manufacture of advanced semiconductor, flat panel display, and solar photovoltaic products. Learn more at www.appliedmaterials.com.

November 10, 2011 — LED lighting maker Gem Hsin Electronics reduced the size of heatsinks in its LED products by drilling miniscule holes beneath LEDs. The holes allow heated air to escape the LED package.

The holes are drilled with laser-guided technology. The direct-air-release holes improve LED efficiency and lifespan, the company reports. It also wides the company’s lighting beam angles (up to 220). Gem Hsin also says that the finished LED products require 20% less energy than competing products and offer 30,000-hour LED life.

Also read: HB-LED packaging materials vs heat

Gem Hsin has started incorporating this advance into its line of T5/T8 LED Tube Lights.

Gem Hsin Electronics is a Taiwan-based manufacturer of LED lamps and other products. To find out more about Gem Hsin and the company’s line of products, go to www.GemHsin.com.

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November 10, 2011 — OSRAM Opto Semiconductors increased its IR Power Topled with lens (SFH 4258S/4259S) optical output by 80% over the standard version by integrating a thin-film chip. The infrared (IR) light emitting diode (LED) has the same surface area and drive current.

OSRAM Opto used Nanostack technology to create the thin-film chip with 2 p-n junctions grown one on top of the other. Because of the series circuit, the voltage is higher by approximately a factor of 2. The increased output in the same package footprint suits designs where real estate, even illumination, and cost are factors, said OSRAM’s representatives.

The IR Power Topled produces 80mW optical output power from an operating current of 70mA. The new LED emits at a wavelength of 850nm. It is available with beam angles of

November 10, 2011 — Philips Lumileds, solid state lighting (LED) maker, deployed Camstar Systems Inc.’s Manufacturing Execution System (MES) at all global sites in 11 months.

Philips Lumileds reports that the MES software enabled "rapid growth and improved product quality" in its LED production.

Also read: LEDs are fundamentally semiconductors from Philips Lumileds

Emile van de Pas of Philips describes how the solution scales with the business, adapts to complex manufacturing, enables process consistency and improvements across all sites, and complements the company

November 9, 2011 – Scanning the latest reports from a quartet of Wall Street analysts — Citi’s Tim Arcuri, Barclays’ CJ Muse, Credit Suisse’s Satya Kumar, and Deutsche Bank’s Vishal Shah — a number of key themes emerge explaining what’s driving a MOCVD slump in 2011-2012 (and maybe beyond), and how and when the situation might improve.

There is much interest and optimism in China’s new lighting roadmap and the clarity it provides for LED adoption (and as a beacon for other regions to follow). The plan includes a RMB 8B/US$1.3B direct demand subsidy/rebate program for consumers, which translates to about ~135M 6W-equivalent bulbs, highlights Citi’s Tim Arcuri. That’s enough to justify "anywhere from 25-60 new MOCVD reactors," he says. Unfortunately, that’s only ~10% of the MOCVD capacity already shipped into China over the past few years.

That’s the crux of the problem: rampant capacity additions on the hopes that end-markets would justify them. But those bets aren’t (yet) paying off, which has given credence to the idea of a "bubble" that needs to be deflated before it rips apart. (Strategies Unlimited’s Tom Hausken addresses the extent of the LED overexpansion, particularly China’s massive investments, in a recent column for Solid State Technology.)

The pull from end markets hasn’t been as strong as hoped: Weak macroeconomic environment have undercut TV sales, and OEMs have pushed back on using more devices. And an intensifying credit crunch has dampened not only TV sales but also firms’ subsidy strategies — many regions haven’t paid out previously committed subsidies, even though LED chipmakers have already received the tools and in some cases even put them into production already, notes Citi’s Tim Arcuri. Some regions (e.g. Wuhu) could extend their timeline (but not amount) for subsidies, while other regions (e.g. Yangzhou) are firm with a 12/31/2011 tool shipment cutoff date.

From a strictly manufacturing and tool-supplier perspective, how is this all shaping up?

Slowing tool demand

Barclays’ CJ Muse sees the MOCVD market in total at ~700 installed tools (down from nearly 800 tools in 2010), with about a -9% difference in 2H11 MOCVD chamber revenues vs. 1H11 — but actual single-chamber-equivalent installations will be -26%. But Credit Suisse’s Satya Kumar points out VECO’s 3Q11 MOCVD orders extrapolate to a ~400 tools/year runrate for the entire LED industry, about half of where they are now.

Here’s Muse’s list of who’s been buying MOCVD tools:

Deutsche Bank’s Vishal Shah digs into specific customer procurement cutbacks:

– Seoul Semi (Korea) has only spent a fraction of its pledged 80B won in capex.
– LG Innotek (Korea) hasn’t bought any tools this year and doesn’t plan any in 2012 either.
– Sanan (China) isn’t buying any new tools until 2012
– Elec-Tech (China) has bought barely a quarter of its planned 130-tool procurement and probably will revise down its 180-tool plan for YE2012.
– Jiangsu Canyang (China) also is cutting its 2011 capex budget.
– Genesis Photonics (Taiwan) is expected to buy only 8 MOCVD tools instead of a planned 10 tools.

Trimming and M&A

Meanwhile, LED makers have been reining in their production. Wall Street analysts universally agree that utilization rates are very low, though the exact number varies by region: anywhere from 60% to ~50%, and maybe even lower. "The hoped-for recovery in tool demand among the Korean and Taiwanese players never materialized," Muse writes. Don’t expect this to improve at least for the next few quarters.

Many have been anticipating a wave of consolidation to help improve the LED market and wipe out overcapacity and underutilization. Muse notes the exit of GCL — before it even started production — is "the first in likely many market exits, similar to what we saw in the Taiwan market several years ago."

Even the threat (or promise) of consolidation has ramifications. Some LED chipmakers likely will cancel more orders and slow down their own expansions, viewing upcoming consolidation as a way to gain capacity instead, Arcuri points out. And as companies consolidate, more (used) tools will be available to the rest of the market as an alternative to new purchases — though some LED firms might be hesitant to take on used (even "unpackaged") tools that might have already been exposed to another LED maker’s process recipes, Muse points out.

2012 projections

"We expect a multi-year downcycle in the MOCVD tool space," says Muse. Arcuri thinks MOCVD orders will keep declining for at least another three quarters. "The backlog cancellations have only just begun," Arcuri warns, predicting that "net orders could actually approach zero" in 4Q11 and 1Q12. "There are […] signs this situation gets worse before it gets better."

All four analysts are on the same page with 2012 expectations: around -40% fewer MOCVD shipments to roughly 400-450 units; China probably pulling back more strongly, Taiwan and Korea perhaps less so. (Initial estimates were for 600 tools or even 700.) Credit Suisse’s Satya Kumar sees a possible 2H12 upside if the TV backlighting market picks up.

But even those levels might be optimistic. "It is hard to see the industry taking >350 MOCVD tools next year," Arcuri declares. And Kumar has a worst-case scenario of 350-400 MOCVD units in 2012.

Upswing on the horizon

For those LED firms (and suppliers) who can weather this bubble and slowdown, circle 2013 on the calendar. "We do believe there is one last push in MOCVD tool demand in 2013/2014," Arcuri writes. Muse sticks with the idea of "a prolonged downturn" in LED tool demand lasting through 2013. That year should be a little better, assuming still-gradual LED demand growth, perhaps increasing overall MOCVD units to ~440.

November 9, 2011 — Taiwan Semiconductor Manufacturing Company (TSMC, NYSE:TSM) Board of Directors have approved about $1,061.4 million in capital expenditures to grow advanced technology process capacity. The funds will also be used to build and expand 12" GigaFab facilities.

The TSMC Board of Directors meeting also led to approvals on R&D capital appropriations and 2012 sustaining capital appropriations of $233.9 million.

Also read: Gartner: 2011 capex softer, 2012 messy

TSMC is a dedicated IC foundry with businesses in the solar and light emitting diode (LED) manufacturing industries as well. Learn more at www.tsmc.com.

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November 8, 2011 — Chalmers University of Technology received the majority of a new Swedish research grant of SEK40 million to study graphene. The financing comes from the Knut and Alice Wallenberg Foundation.

A group of some 30 Swedish graphene researchers will be formed, in a close collaboration between Chalmers and the universities at Uppsala and Linköping.

This will provide “valuable cross-fertilization between several research areas,” said Mikael Fogelström, the project coordinator. The grant will fund graphene production as well as its integration into various devices, and basic research into experimental and theoretical physics, Fogelström explained.

Also read: Graphene doping doesn’t need its own step when done on the edge

The researchers will develop reliable synthesis methods designed to produce high-quality graphene surfaces. Following that, the material will be investigated and processed at the nano level, developing graphene-based electronic devices.

Chalmers researchers have developed a new standard for the quantum of resistance — a “tuning fork” for calibrating the correct resistance in electrical instruments and devices. The graphene-based resistance standards are as accurate as those based on silicon (Si) or gallium arsenide (GaAs), but easier to make and use.

Chalmers has also developed a graphene transistor that operates at more than 10 gigahertz, and are currently working on hitting the terahertz range, funded by a SEK 28.5 million grant from the Foundation for Strategic Research over a five-year period.

Chalmers researchers are considering creating a graphene research center there, based on these continuous funding announcements. Fogelström says. “That would be a good step to take for pursuing EU flagship funds.”

For further details, please contact Mikael Fogelström, Department of Microtechnology and Nanoscience, Chalmers University of Technology, +46 31 772 31 96, [email protected]

Read more about the pilot project led by Chalmers that may become an EU scientific flagship

Read more about the researchers’ previous breakthroughs with graphene