Patent ID: 7935611
Filing Date: 2011-05-03
Classification: H01L,Y02E,Y02P

Abstract:
1. A method for manufacturing a substrate for photoelectric conversion elements, the method comprising: first, forming a silicon layer having a second conductivity type opposite to a first conductivity type on a surface layer of a silicon substrate having said first conductivity type; second, forming a hydrogen ion-implanted layer by implanting ions into a silicon crystal region having said first conductivity type through said silicon layer having said second conductivity type; third, vapor-phase growing a germanium-based crystal layer on said silicon layer having said second conductivity type by successively laminating germanium crystals or silicon-germanium mixed crystals having said first and second conductivity types; fourth, applying a surface activation treatment to at least one surface selected from the group consisting of a surface of a supporting substrate and a surface of said germanium-based crystal layer; fifth, bonding together the surface of said germanium-based crystal layer and the surface of said supporting substrate; and sixth, forming a laminated body composed of a germanium-based crystal and a silicon crystal on said supporting substrate by peeling off the surface layer of said silicon substrate along said hydrogen ion-implanted layer.