Patent ID: 7009009
Filing Date: 2006-03-07
Classification: H01L

Abstract:
1. A curable composition comprising: (a) an epoxy resin; (b) a latent fluxing agent which liberates a phenolic compound or a carboxylic acid containing compound when heated above 140° C.; and (c) a compound for effecting cure of the epoxy resin wherein the latent fluxing agent is selected from the group consisting of an α-alkoxyalkyl ester of a carboxyl-containing compound, an α-alkoxyalkyl phenyl ether, and a compound having one or more of the following structures I through VI: wherein X denotes or Y denotes E denotes an organic group derived from a 1-alkenyl ether and is selected from the group consisting of a hydrocarbon, ether, thioether, ester, thioester, carbamate, amide, and a combination thereof; F denotes an organic group fragment derived from a multifunctional 1-cycloalkenyl ether wherein the cyclic ether groups are linked through F, and is selected from the group consisting of a hydrocarbon, ether, thioether, ester, thioester, carbamate, amide, and a combination thereof; R R R R n is an integer of from 2–30, p is an integer of 1 or 2 and q is an integer of from 5–30.