This article will first describe the driving force for the development and use of thermally conductive adhesives and the various applications in which they are employed. The article will then identify various types of thermally conductive adhesives that are used in these applications and provide an overview of how they work. There is an increasing interest in the use of thermally conductive adhesives for electronic packaging applications. The major driving factor is the miniaturization of substrates. In these applications high thermal conductivity and dimensional stability are required from the adhesive. Thermal management of electronic devices has become a significant area of development, and thermally conductive adhesives provide a way to transfer heat away from sensitive electronic components. Modern thermally conductive adhesives provide efficient heat transfer properties, but they also have relatively low cost and lower toxicity than conventional technology.
Great article on critical technology - Feb 01, 2012
posted by Darin Jensen, R&D - Applied/ Formulation/ Product development at Donaldson
Great and timely article Dr. Petrie. Having worked in the industry for a bit, the thermal conductive technology combined with high dielectric strength is critical to the advancement of low cost LED ighting. Caledon Controls has developed a great product, but the cure profile is not conducive to high speed production. It is far less expensive than the sintered ceramic which is commonly used.
For anyone doing the research, what is needed is a thermally conductive, high dielectric material that is capable of rotary screen printing with tack times of a few minutes not hours. Post curing can be done, but it will need to have the conductive components and soldermask on it when done. The technology is very close, but this is what will make LED lighting accesible to the world...envision replacement of every flourescent tube with LED...Green and very lucrative...Good Luck All!