Patent ID: 9059247
Filing Date: 2015-06-16
Classification: H01L

Abstract:
1. A method for manufacturing an SOI substrate, comprising the steps of: forming a brittle layer in a single-crystalline semiconductor substrate so that a single-crystalline semiconductor layer is provided on the brittle layer; forming a cap layer over the single-crystalline semiconductor layer; bonding the single-crystalline semiconductor layer and a supporting substrate to each other with the cap layer interposed therebetween; and separating the single-crystalline semiconductor layer from the single-crystalline semiconductor substrate at the brittle layer so that the single-crystalline semiconductor layer is formed over the supporting substrate with the cap layer interposed therebetween, wherein a thickness from a top surface to a bottom surface of the single-crystalline semiconductor substrate is 50 μm or less, and wherein the top surface and the bottom surface of the single-crystalline semiconductor substrate are exposed to air.