Patent ID: 6809162
Filing Date: 2004-10-26
Classification: C08G,H01L

Abstract:
A packaged solid state device comprising: (a) a package; (b) a chip (4); and (c) an encapsulant (11) comprising: (A) greater than about 60% by weight of at least one cycloaliphatic epoxy resin, (B) a curing agent comprising hexahydro-4-methylphthalic anhydride the molar ratio of (B):(A) being less than about 0.37:1, (C) between about 1% by weight and about 6% by weight of at least one a boron containing catalyst that is essentially free of halogen, and (D) between about 1% by weight and about 6% by weight of at least one cure modifier, wherein the percentages by weight are based on the combined weight of (A), (B), (C) and (D).