Patent ID: 8338918

Claim:
A method for detecting a semiconductor substrate, comprising: preparing a semiconductor substrate with a first notch; preparing a supporting substrate with a second notch; laminating said semiconductor substrate with said supporting substrate so that said first notch can be matched with said second notch; detecting said first notch so as to detect a position of said semiconductor substrate; processing a second main surface of said semiconductor substrate opposite to a first main surface thereof facing to said supporting substrate to reduce a thickness of said semiconductor substrate to a predetermined thickness after the laminating of said semiconductor substrate; forming an active element region on said first main surface of said semiconductor substrate; forming a first wiring layer on said first main surface of said semiconductor substrate so as to be electrically connected with said active element region; forming a through hole at said semiconductor substrate so as to connect said first main surface and said second main surface; forming a second wiring layer on said second main surface of said semiconductor substrate so as to be electrically connected with said first, wiring layer via a conductive layer formed in said through hole before the detecting of the said first notch, wherein a size of said second notch is smaller than a size of said first notch so that edges of said second notch are located inside from edges of said first notch when said first notch is matched with said second notch, wherein said first notch is detected by a pin.