METHOD FOR MANUFACTURING SUBSTRATE FOR PHOTOELECTRIC CONVERSION ELEMENT

摘要

A silicon layer (10B) having a conductivity type opposite to that of a bulk is provided on the surface of a silicon substrate (100) and hydrogen ions are implanted to a predetermined depth (L) into the surface region of the silicon substrate (100) through the silicon layer (10B) to form a hydrogen ion-implanted layer (11). Then, an n-type germanium-based crystal layer (20A) whose conductivity type is opposite to that of the silicon layer (10B) and a p-type germanium-based crystal layer (20B) whose conductivity type is opposite to that of the germanium-based crystal layer (20A) are successively vapor-phase grown to provide a germanium-based crystal (20). The surface of the germanium-based crystal layer (20B) and the surface of the supporting substrate (30) are bonded together. In this state, impact is applied externally to separate a silicon crystal (10) from the silicon substrate (100) along the hydrogen ion-implanted layer (11), thereby transferring (peeling off) a laminated structure composed of the germanium-based crystal (20) and the silicon crystal (10) onto the supporting substrate (30).