Benzocyclobutene-based die attach adhesive compositions

Claim 1

A die attach adhesive composition comprising a homogeneous blend of: (a) about 5 to about 30 weight percent of a bisbenzocyclobutene monomer of the formula: ##STR12## wherein: each R is independently alkyl of 1 to 6 carbon atoms, cycloalkyl, aralkyl, or phenyl; each R 1 is independently vinyl, allyl, methallyl, or styryl; each R 2 is independently substituted or unsubstituted alkyl of 1 to 6 carbon atoms, methoxy, acetate, trifluoroacetate, nitro, chloro, bromo, or iodo; each R 3 is independently chloro, bromo, iodo, nitro, substituted or unsubstituted alkyl of 1 to 6 carbon atoms, and cyano; n is an integer of 1 or more; and each q and r are independently integers of zero or 1; (b) about 1 to about 10 weight percent of an organosilane adhesion promoter of the formula: R.sub.n SiX.sub.(4-n) wherein R is a nonhydrolyzable organic radical that possesses a benzocyclobutene-reactive functionality; X is alkoxy, acyloxy, or amino; and n is an integer of 1, 2, and 3; and (c) an amount of an electrically conductive metal effective for the composition to reach the percolation threshold.