Patent ID: 6878783
Filing Date: 2005-04-12
Classification: C08G,C08K,H01L

Abstract:
1. A packaged solid state device comprising: (a) a package; (b) a chip; and (c) an encapsulant comprising: (A) greater than about 60% by weight at least one cycloaliphatic epoxy resin, (B) at least one anhydride curing agent such that a molar ratio of (B):(A) is less than about 0.58:1. (C) between about 1% by weight and about 6% by weight of at least one boron containing catalyst that is essentially free halogen, (D) between about 1% by weight and about 6% by weight of at least one cure modifier, and, optionally (E) at least one ancillary curing catalyst; wherein the percentage by weight are based on the combined weight of (A),(B),(C),and (D).