Patent ID: 6962860

Claim:
A method of manufacturing a semiconductor device, wherein an insular semiconductor film having crystalline characteristics is formed by irradiating a first laser beam in a first direction to a semiconductor film at a region defined by pattern information and then irradiating a second laser beam in a second direction at a region defined by said pattern information and thereby enhancing the crystalline characteristics of said regions defined by said pattern information, followed by patterning of said regions where the crystalline characteristics have been enhanced through the use of said pattern information, wherein: said first laser beam or said second laser beam is irradiated to said semiconductor film at a partial region containing said regions defined by said pattern information; said first direction and said second direction cross with each other; and in a thin film transistor fabricated using said insular semiconductor film, a direction in which carriers move in a channel forming region is in parallel with at least one of said first direction and said second direction.