Patent ID: 9312166
Filing Date: 2016-04-12
CPC Classification: H01L

Claim Text:
1. A method for manufacturing composite wafers comprising at least the steps of: bonding surfaces of at least two handle wafers and a surface of a donor wafer which has a diameter greater than or equal to a sum of diameters of the at least two handle wafers and which has a hydrogen ion implantation layer formed inside thereof by implanting hydrogen ions from the surface of the donor wafer, to obtain a bonded wafer; heating the bonded wafer at 200° C. to 400° C.; and detaching a film from the donor wafer along the hydrogen ion implantation layer of the heated bonded wafer, to obtain the composite wafers having the film transferred onto the at least two handle wafers, wherein the diameter of the donor wafer is 4 inches to 12 inches, and the diameter of each of the at least two handle wafers is 2 inches to 6 inches.