Base Film and Pressure-Sensitive Adhesive Sheet Provided Therewith

摘要

To prevent bumps on the circuit side of a bump-bearing wafer from getting crushed when grinding the back side of said wafer while protecting the circuit side with a surface-protection sheet, and also to minimize the formation of dimples and cracks on the side being ground. [Solution] This base film for a pressure-sensitive adhesive sheet bonded to a semiconductor wafer comprises: (A) a layer obtained by using energy rays to cure a formulation containing a urethane (meth)acrylate oligomer and a thiol-group-containing compound; and (B) a layer comprising a thermoplastic resin.