Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
2005-01-18
2005-01-18
Sellers, Robert (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C523S428000, C523S434000, C525S113000, C525S122000, C525S524000
Reexamination Certificate
active
06844379
ABSTRACT:
Compositions having high moisture resistance and flexibility comprise an organic component and a filler. The organic component comprises a long-chain cycloaliphatic epoxy resin, a short-chain cycloaliphatic epoxy resin, a cyanate ester, and a Lewis acid catalyst. Preferably the organic component further comprises a Bronsted acid co-catalyst and/or a flexibilizing modifier. The compositions are useful in various semiconductor applications, including as die attach adhesives, underfills, encapsulants, via fills, prepreg binders, polymer solder masks and polymer bumps on flip chip or BGA assemblies.
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Chemical abstracts registry No. 25085-98-7 for UVACURE 1500, 1967.*
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UVACURE products sheet for UVACURE 1500, 1999.
Grieve Alan
Iwamoto Nancy
Li Shao Wei
Wevick Henry
Zhou Xiao-Qi
Honeywell International , Inc.
McCutchen Bingham
Sellers Robert
Thompson Sandra P.
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