Patent ID: 9224630
Filing Date: 2015-12-29
Classification: H01L

Abstract:
1. Method for producing a product wafer, the method including steps of: bonding a first side of the product wafer to a first rigid carrier wafer with a first intermediate layer, the first intermediate layer including one first adhesion layer applied at least on the edge side of the first side of the product wafer, the first adhesion layer made of a first material, processing a second side of the product wafer opposite to the first side by application of chips to the second side, bonding the second side of the product wafer to a second rigid carrier wafer with a second intermediate layer, the second intermediate layer including: after both the first rigid carrier wafer and the second rigid carrier wafer are bonded to the product wafer, applying a first force to the combination of the first rigid carrier wafer, the second rigid carrier wafer and the product wafer wherein the first rigid carrier wafer and the first intermediate layer are separated from the product wafer, and after the first rigid carrier wafer and the first intermediate layer are separated from the product wafer, applying a second force to the second rigid carrier wafer wherein the second rigid carrier wafer and the second intermediate layer are separated from the product wafer.