MT-431, from Lord Corporation, is a non-silicone thermal die lid attach (TDLA) adhesive that was reportedly developed to replace two material processes, with a single effective solution. The material is formulated with thermal and adhesion properties that perform well enough to replace both typical thermal interface materials (TIMS) and lid attach adhesive. It reduces the number of process and cure steps, and also reduces the potential for coefficient of thermal expansion (CTE) mismatch between the materials, which can lead to cracking at either the lid attach of TIM areas.

Current and developmental TDLAs are based on silicone or modified silicone chemistries limit adhesion potential. Therefore, MT-43 is based on a proprietary non-silicone polymer that is then filled for high conductivity, with other additives to improve material properties. Pull test, thermal cycling and humidity testing has reportedly produced favorable results. Lord Corporation Cary, NC www.lord.com