Patent ID: 8530332
Filing Date: 2013-09-10
Classification: H01L

Abstract:
1. A method for manufacturing an SOI substrate comprising the steps of: forming a single crystal semiconductor layer by an epitaxial growth method over a surface of a single crystal semiconductor substrate; performing first thermal oxidation treatment on the single crystal semiconductor layer to form a first oxide film on the single crystal semiconductor layer; irradiating a surface of the first oxide film with ions containing H bonding the single crystal semiconductor layer and a base substrate with the first oxide film interposed between the single crystal semiconductor layer and the base substrate; dividing the single crystal semiconductor layer by performing thermal treatment at a region where the ions are introduced, so that the single crystal semiconductor layer is partly left over the base substrate; irradiating the single crystal semiconductor layer left over the base substrate with laser light; performing second thermal oxidation treatment on the single crystal semiconductor layer left over the base substrate to form a second oxide film on the single crystal semiconductor layer left over the base substrate; and removing the second oxide film.