Patent ID: 6900113
Filing Date: 2005-05-31
Classification: H01L,Y10S

Abstract:
1. A method for producing a bonded wafer comprising at least an ion implantation process where at least either hydrogen ions or rare gas ions are implanted into a first wafer from its surface to form a single micro bubble layer (implanted layer) in the first wafer, a bonding process where the surface subjected to the ion implantation of the first wafer is bonded to a surface of a second wafer, and a delamination process where the first wafer is delaminated at the micro bubble layer, wherein the ion implantation process is performed in divided multiple steps to form the single bubble layer in the first wafer, and a total implantation dose of the divided multiple implantation steps for the single bubble layer is set to obtain a dose required for the delamination, and a wafer cleaning process is performed at least once during an interval between the multiple ion implantation steps.