Patent ID: 6558228
Filing Date: 2003-05-06
Classification: B24B,H01L

Abstract:
A method of separating a substrate from a wetted polishing pad in a CMP apparatus comprising the steps of:providing a substrate retained in a CMP carrier head, said CMP carrier head having placed said substrate in contact with a wetted polishing pad within the CMP apparatus; performing a CMP operation using a CMP slurry to remove material from the surface of said substrate in contact with the wetted polishing pad; terminating dispensation of the CMP slurry used to remove material from the surface of said substrate; dispensing onto the polishing pad a low surface tension liquid, comprising water at a temperature between about 50Â° C. and 80Â° C.; moving said substrate across said polishing pad wetted with said low surface tension liquid, comprising water at a temperature between about 50Â° C. and 80Â° C., to cause the interface between said substrate and said polishing pad to be wetted with said low surface tension liquid, comprising water at a temperature between about 50Â° C. and 80Â° C.; and then applying a force to cause separation of the substrate from the polishing pad wetted with said low surface tension liquid, comprising water at a temperature between about 50Â° C. and 80Â° C.