Reworkable composition of oxirane(s) or thiirane(s)-containing resin and curing agent

摘要

A composition useful as underfill sealant for the connection of a semiconductor device to a circuit board is reworkable for more easy separation from the semiconductor device and comprises a curable resin having at least one oxirane or thiirane linkage substituted on at least three of the oxirane or thiirane carbon atoms with an alkyl, alkenyl or aryl substituent along with a curing agent selected from anhydrides, amines, amides, imidazoles, and combinations thereof.