Patent ID: 6478918
Filing Date: 2002-11-12
Classification: H01L,Y10T

Abstract:
A method of processing a semiconductor wafer, the method comprising the steps of:(a) providing a semiconductor wafer; (b) adhesively bonding the semiconductor wafer to an adhesive surface of a semiconductor wafer processing tape comprising a permanent backing and a layer of a nonpressure sensitive adhesive on the permanent backing, the adhesive comprising a copolymer comprising at least one copolymerized acrylic or methacrylic acid ester of a non-tertiary alkyl alcohol having a homopolymer glass transition temperature of no greater than about 10Â° C., in which the alkyl group contains about 4 to about 14 carbon atoms on average, at least one copolymerized reinforcing monofunctional acrylic monomer having a homopolymer glass transition temperature of at least 10Â° C., and at least one copolymerized nonionic photocrosslinking agent; (c) processing the semiconductor wafer by either grinding the backside of the wafer or dicing the wafer into integrated circuit semiconductor chips; and (d) removing the tape without a substantial change in optical density of the wafer.