Patent ID: 7306981
Filing Date: 2007-12-11
Classification: G09G,H01L

Abstract:
1. A manufacturing method of a semiconductor device comprising: forming an electrode over an insulating surface, forming a first semiconductor film-having amorphous structure over the electrode, forming a first insulating film over the first semiconductor film, forming a second semiconductor film having amorphous structure over the first insulating film, irradiating a laser beam to said first semiconductor film having amorphous structure and said second semiconductor film having amorphous structure to form a first semiconductor film having crystal structure and a second semiconductor film having crystal structure simultaneously, forming a second insulating film over said second semiconductor film, adding an impurity element for imparting P-type to said first semiconductor film having crystal structure, adding an impurity element for imparting N-type to said second semiconductor film having crystal structure, forming a first contact hole through said second insulating film, forming a second contact hole through the second insulating film and said first insulating film, forming a first wiring in the first contact hole for connecting to the second semiconductor film, and forming a second wiring in the second contact hole for connecting to the first semiconductor film.