Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2011-08-30
2011-08-30
Eashoo, Mark (Department: 1767)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C524S500000, C257S793000, C257SE23119
Reexamination Certificate
active
08008410
ABSTRACT:
There is provided an epoxy resin composition for encapsulating a semiconductor comprising an epoxy resin (A), wherein the epoxy resin (A) including: a crystalline epoxy resin (a1) having a melting point of 50° C. to 150° C., an epoxy resin (a2) represented by formula (1), and at least one epoxy resin (a3) selected from an epoxy resin represented by formula (2) and an epoxy resin represented by a formula (3):in which R1's, which may be the same or different, represent a hydrocarbon group having 1 to 4 carbon atoms; R2's, which may be the same or different, represent a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms; m is an integer of 0 to 5; and n is an integer of 0 to 6.
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English machine translation of JP 2005-015689 A, Ogura et al, Jan. 20, 2005.
Office Action received in CN 200780034308 mailed Dec. 31, 2010. English translation provided.
Kotani Takahiro
Nishitani Yoshinori
Oka Daisuke
Eashoo Mark
Karst David
Smith , Gambrell & Russell, LLP
Sumitomo Bakelite Company Ltd.
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