Patent ID: 9559073
Date: 2017-01-31
CPC Classifications: C09J,H01L,Y10T

Claim:
1. A pressure sensitive adhesive sheet to be adhered on a semiconductor wafer, comprising: a pressure sensitive adhesive layer on a base film, said base film comprising (A) a layer of a cured product in which a composition including a urethane (meth)acrylate oligomer, a thiol group containing compound, and an energy ray curable monomer is cured by an energy ray irradiation before adhering the pressure sensitive adhesive sheet to the semiconductor wafer, and (B) a thermoplastic resin layer, wherein a content of the thiol group containing compound of said composition is 2 to 100 mmol with respect to 100 g of urethane (meth)acrylate oligomer.