Patent ID: 8263478
Filing Date: 2012-09-11
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor substrate, comprising: a first step of implanting hydrogen ions to a main surface side of a silicon substrate at a dosage of 1.5×10 a second step of bonding a main surface of the silicon substrate and a main surface of a support substrate made of a low melting point material; a third step of performing heat treatment on the bonded substrate at a temperature of 120° C. or higher and 250° C. or lower and below a melting point of the support substrate; a fourth step of delaminating a silicon crystal film along a hydrogen ion implanted boundary of the silicon substrate out of the bonded substrate after the heat treatment to form a silicon thin film on a surface of the support substrate; wherein the support substrate is made of plastics; the second step of bonding the substrates is carried out by applying silicon oil to the main surface of the silicon substrate and the main surface of the support substrate; and the support substrate is held by using a vacuum chuck stage in the fourth step of delaminating.