Patent ID: 9644118
Date: 2017-05-09
CPC Classifications: C09J,H01L

Claim:
1. A method of releasably attaching a semiconductor substrate to a carrier substrate comprising: (a) providing a semiconductor substrate having a front side and a back side, the front side having a copper surface; (b) providing a carrier substrate having an attachment surface; (c) disposing a temporary bonding composition comprising a curable adhesive material, a release additive, and a copper passivation agent between the front side of the semiconductor substrate and the attachment surface of the carrier substrate, wherein the release additive is chosen from polyether compounds, polyetheramine compounds, and mixtures thereof; (d) curing the curable adhesive material to provide a temporary bonding layer disposed between the front side of the semiconductor substrate and the attachment surface of the carrier substrate; wherein the temporary bonding layer adjacent to the attachment surface of the carrier substrate comprises a relatively lower amount of the release additive and the temporary bonding layer adjacent to the front side of the semiconductor substrate comprises a relatively higher amount of the release additive; (e) performing an operation on the back side of the semiconductor substrate; and (f) separating the front side of the semiconductor substrate from the temporary bonding layer.