High temperature underfilling material with low exotherm during use
AssigneeNational Starch and Chemical Investment Holding Corporation
InventorsNeil M. Carpenter, Michel Ruyters
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Abstract
A curable underfill composition comprising an epoxy containing a curing agent component and a latent accelerator component. The accelerator component comprises a material which produces a resin with an exotherm below 300 J/g. Further, the combination may be utilized in an unfilled state which allows the epoxy to remain very viscous and thus increases the speed of the underfill process in comparison to filled epoxy compositions and epoxy compositions containing different accelerator components.
Claims13
A curable underfill composition comprising in the range of about 10 to about 90 weight percent resin, in the range of about 5 to 20 weight percent reactive diluent, in the range of about 1 to about to 25 weight percent curing agent, in the range of about 30 to 80 weight percent filler material and in the range of about 1 to 10 weight percent accelerator agent, wherein the composition has an exotherm of less than 300 J/g and wherein the accelerator agent comprises a blocked amine with tertiary amine and urea moieties.
Dependencies are inferred from the claim text.