Patent ID: 8314009
Filing Date: 2012-11-20
Classification: H01L

Abstract:
1. A method for manufacturing an SOI substrate comprising the steps of: forming an oxide film on a surface of each of a plurality of semiconductor substrates by performing heat treatment on each of the plurality of semiconductor substrates in an oxidative atmosphere containing a halogen; arranging the plurality of semiconductor substrates on a first base substrate; irradiating the plurality of semiconductor substrates on the first base substrate with an ion beam in a rectangular shape or a linear shape through the oxide film while moving the plurality of semiconductor substrates relative to the ion beam in a short side direction of the ion beam, thereby forming a separation layer in a region at a predetermined depth from the surface of each of the plurality of semiconductor substrates; forming a nitrogen-containing layer over the oxide film; forming an insulating layer over the nitrogen-containing layer; bonding the insulating layer and a second base substrate; and forming a single crystal semiconductor layer over the second base substrate with the insulating layer, the nitrogen-containing layer, and the oxide film interposed therebetween by cleaving each of the plurality of semiconductor substrates with the separation layer functioning as a cleavage plane, wherein the ion beam is irradiated to the plurality of semiconductor substrates from a direction substantially perpendicular to the plurality of semiconductor substrates at the same time.