Patent ID: 7005364

Claim:
A method for manufacturing a semiconductor device, comprising: an insulating film pattern formation step of forming, on a semiconductor substrate, an insulating film pattern with an aperture at an impurity introduction region for introducing impurities into the semiconductor substrate and an aperture at a positioning mark region for adjusting a position of a photomask with respect to the semiconductor substrate; a first photosensitive pattern formation step of forming, on the insulating film pattern, a first photosensitive pattern with an aperture that exposes the positioning mark region, the first photosensitive pattern covering the impurity introduction region; a level difference formation step of forming, at the positioning mark region in the semiconductor substrate, a level difference for adjusting the position of the photomask at the aperture formed in the insulating film pattern; after the level difference formation step, a first photosensitive pattern removal step of removing the first photosensitive pattern; and after the first photosensitive pattern removal step, an impurity introduction step of introducing the impurities through the aperture formed in the insulating film pattern into the impurity introduction region.