Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
2005-07-28
2011-12-27
Heincer, Liam (Department: 1767)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C524S437000
Reexamination Certificate
active
08084520
ABSTRACT:
An epoxy resin composition comprising (A) an epoxy resin (B) a phenol resin, (C) a curing accelerator, (D) silica, and (E) alumina and/or aluminum hydroxide, wherein the amount of aluminum to the total amount of the epoxy resin composition is 0.25-5 wt % and 70 wt % or more of the silica has an average particle size of 25 μm or less. The epoxy resin composition for semiconductor encapsulating and a semiconductor device comprising a semiconductor element encapsulated using the composition possess excellent characteristics in reliability during high temperature operation.
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Heincer Liam
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Sumitomo Bakelite Co. Ltd.
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