Patent ID: 6911359

Claim:
A method for manufacturing a semiconductor device, comprising the steps of: forming an insulating film on a substrate; forming an aperture extending substantially perpendicular to a surface of the insulating film at a prescribed position on the surface of the insulating film; forming an amorphous silicon film on the insulating film with a prescribed thickness; changing the amorphous silicon film into a polycrystalline silicon film by controlling solid-phase growth through a heat treatment such that the aperture, in the diameter direction of the aperture, contains only a single grain of polycrystalline; irradiating the polycrystalline silicon film by a laser beam under a prescribed condition, and maintaining the polycrystalline silicon inside the aperture in an unmelted state, while melting other parts of the polycrystalline silicon film, and generating crystal growth using the unmelted polycrystalline silicon inside the aperture as a crystal nucleus, and forming a silicon film in a substantially single crystal state in an area around the aperture in the polycrystalline silicon film; and producing a semiconductor device having the silicon film in the substantially single crystal state as a semiconductor film.