Patent ID: 9334424
Filing Date: 2016-05-10
CPC Classification: B32B,C09J,H01L,Y10T

Claim Text:
1. A temporary adhesive for wafer processing which temporarily bonds a wafer having a circuit face on the front surface and a processing face on the back surface to a support, comprising a first temporary adhesive layer which is a layer (A) of a thermoplastic resin modified organopolysiloxane obtained by partial dehydration condensation of an organopolysiloxane resin containing a R 21 R 22 R 23 SiO 1/2 unit, wherein R 21 , R 22 , and R 23 represent each a substituted or an unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms or a hydroxyl group, and a SiO 4/2 unit in a molar ratio of R 21 R 22 R 23 SiO 1/2 unit/SiO 4/2 unit of 0.6 to 1.7 and an organopolysiloxane represented by the following general formula (1), and a second temporary adhesive layer which is a thermosetting modified siloxane polymer layer (B) which is laminated on the first temporary adhesive layer and is releasably bonded to the support, wherein R