Patent ID: 9365681
Filing Date: 2016-06-14
CPC Classification: C08G,C08L,C09D,C09J,H01L,Y10T

Claim Text:
1. A wafer processing laminate comprising a support, a temporary adhesive layer on the support, and a wafer laid contiguous to the temporary adhesive layer, the wafer having a circuit-forming front surface and a back surface to be processed, said temporary adhesive layer comprising a composite temporary adhesive unit having a trilayer structure consisting of a first temporary bond layer (A) of thermoplastic organosiloxane polymer which is releasably bonded to the front surface of the wafer, a second temporary bond layer (B) of thermosetting modified siloxane polymer which is laid contiguous to the first temporary bond layer, and a third temporary bond layer (A′) of thermoplastic organosiloxane polymer which is laid contiguous to the second temporary bond layer and releasably bonded to the support, wherein the first and third temporary bond layers (A) and (A′) each comprise a thermoplastic organopolysiloxane polymer consisting of difunctional siloxane units of R wherein the first and third temporary bond layers (A) and (A′) each have a thickness in the range of 0.1 to 10 μm.