Patent ID: 7211476
Filing Date: 2007-05-01
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: a first step of forming a first semiconductor film comprising an amorphous structure over a substrate with an insulating surface; a second step of providing a metal element over the first semiconductor film; a third step of irradiating the first semiconductor film over which the metal element is provided with a light from a back side of the substrate in order to increase the number of crystal nuclei in the first semiconductor film, wherein after the third step, the first semiconductor film comprising the amorphous structure with the increased number of crystal nuclei is formed; a fourth step of heating the first semiconductor film in order to crystallize the amorphous structure in the first semiconductor film to form a second semiconductor film comprising a crystal structure; a fifth step of patterning the second semiconductor film to form an active layer by etching; and a sixth step of forming a channel region using a part of the active layer.