Patent ID: 6617401
Filing Date: 2003-09-09
Classification: C08G,H01L

Abstract:
A curable epoxy resin composition for encapsulation of a solid state device, which comprises: (A) at least one cycloaliphatic epoxy resin, (B) a curing agent comprising hexahydro-4-methylphthalic anhydride, (C) at least one a boron containing catalyst that is essentially free of halogen, and (D) at least one cure modifier, wherein component (A) is present at a level of greater than about 60% by weight based on the combined weight of components (A), (B), (C), and (D); component (C) is present at a level in a range of between about 1% by weight and about 6% by weight based on the combined weight of components (A), (B), (C), and (D); component (D) is present at a level in a range of between about 1% by weight and about 6% by weight based on the combined weight of components (A), (B), (C), and (D); and the molar ratio of component (B) to component (A) is less than about 0.37.