Patent ID: 8268700

Claim:
A method for manufacturing an SOI wafer comprising at least: implanting a hydrogen ion, a rare gas ion, or both the ions into a donor wafer formed of a silicon wafer or a silicon wafer having an oxide film formed on a surface thereof from a surface of the donor wafer, thereby forming an ion implanted layer; performing a plasma activation treatment with respect to at least one of an ion implanted surface of the donor wafer and a surface of a handle wafer, wherein the handle wafer is a SiC wafer or an aluminum nitride wafer, and wherein the surface of the handle wafer is to be bonded to the ion implanted surface; closely bonding the ion implanted surface of the donor wafer to the surface of the handle wafer; delaminating the donor wafer only mechanically without performing a heat treatment at the ion implanted layer as a boundary and thereby reducing a film thickness thereof to provide an SOI layer, and subsequently performing a heat treatment at 600 to 1000° C.; etching a surface of the SOI layer for 10 to 50 nm based on a GCIB processing; and then polishing the surface of the SOI layer after the GCIB processing for 10 to 30 nm based on chemical mechanical polishing.