There are many kinds of silicone gels, which can be divided into addition molding and condensation in terms of reaction types.

Condensed silicone gel has good adhesion and self-repair, but small molecules will be produced in the reaction process, the shrinkage rate is large, and it is easy to form bubbles, so it is not suitable for power semiconductor packaging with high potting requirements.

The additive silicone gel is mainly composed of vinyl silicone oil (or propylene), hydrogen-containing silicone oil and precious metal catalyst, etc., the reaction process is the addition reaction of vinyl and active hydrogen, no by-product production, high purity of sulfide and no shrinkage, so the additive silicone gel is mainly used in IGBT packaging.


Phenyl silicone gel,pls check IOTA 3128