Patent ID: 6534380
Filing Date: 2003-03-18
Classification: H01L,Y10S

Abstract:
A method of manufac turing a semicon ductor substrate composed of a base substrate and a semiconductor layer disposed on the base substrate in an insulated state from the base substrate, the method comprising:forming a contamination protective layer on a semiconductor substrate material; formning an ion-implanted layer in the semiconductor substrate material by implanting ions through the contamination protective layer; removing at least a part of the contamination protective layer from the semiconductor substrate material to secure a flat contamination-free surface; providing hydrophilicity to the flat contamination-free surface and to a base substrate treatment surface of the base substrate; directly bonding the semiconductor substrate material and the base substrate at the substrate material treatment surface and at the base substrate treatment surface; detaching the semiconductor substrate material from the base substrate at the ion-implanted layer by a heat treatment, wherein in the removing at least the part of the contamination protective layer, only an upper part of the contamination protective layer is removed.