Patent ID: 8822306
Filing Date: 2014-09-02
Classification: C30B,H01L

Abstract:
1. A method for manufacturing a composite wafer, comprising: providing a carrier wafer comprising a graphite layer; providing a monocrystalline semiconductor wafer comprising a first side and a second side; forming a bonding layer on at least one of the first side of the semiconductor wafer and the graphite layer of the carrier wafer, the bonding layer comprising a material selected from the group consisting of a metal, metal carbide and metal silicide; joining the monocrystalline semiconductor wafer with the graphite layer of the carrier wafer through the bonding layer; and subjecting the carrier wafer, the monocrystalline semiconductor wafer and the bonding layer to a thermal treatment to form an electrically conductive bond between the carrier wafer and the monocrystalline semiconductor wafer.