Patent ID: 6875628

Claim:
A method for manufacturing a semiconductor device comprising the steps of: forming a semiconductor film over a substrate; disposing a crystallizing promoting material in contact with a selected portion of the semiconductor film; crystallizing the semiconductor film by heating wherein a crystal grows from said selected portion of the semiconductor film to a second portion of the semiconductor film adjacent to said selected portion; patterning the crystallized semiconductor film to form an active layer wherein said active layer includes at least a first region and a second region where said first region includes at least a part of the selected portion of the semiconductor film and said second region includes at least a part of the second portion of the semiconductor film; forming a gate insulating film over the active layer; forming a gate electrode over the gate insulating film; forming an insulating film over the gate insulating film; and forming a wiring over the insulating film, wherein the wiring is in contact with said first region of the active layer.