Patent ID: 6235387
Filing Date: 2001-05-22
Classification: H01L,Y10T

Abstract:
A semiconductor wafer processing tape comprising a permanent backing and a layer of a nonpressure sensitive adhesive on the permanent backing; the nonpressure sensitive adhesive comprising a copolymer comprising at least one of a first copolymerized monoethylenically unsaturated monomer, at least one of a second copolymerized monoethylenically unsaturated monomer, and at least one copolymerized nonionic crosslinking agent; wherein the second monoethylenically unsaturated monomer is a reinforcing monomer having a homopolymer glass transition temperature higher than that of the first monoethylenically unsaturated monomer; and further wherein the adhesive does not produce a substantial change in optical density of a wafer after the tape is applied to a surface of the wafer and removed.