Patent ID: 7588981
Filing Date: 2009-09-15
Classification: G02F,H01L

Abstract:
1. A semiconductor device comprising: a substrate having an insulating surface; a crystalline semiconductor film formed over the insulating surface, the crystalline semiconductor film having a source region, a drain region, and a channel forming region sandwiched between the source region and the drain region; a gate insulating film formed on the crystalline semiconductor film; a gate electrode formed on the gate insulating film; an interlayer insulating film formed on the gate electrode; a film containing an impurity element belonging to the group 15 of the periodic table formed on the interlayer insulating film; and a conductive layer formed on the film containing the impurity element belonging to the group 15 of the periodic table, wherein the film containing the impurity element belonging to the group 15 of the periodic table is in contact with one of the source region and the drain region of the crystalline semiconductor film in a contact hole formed in the interlayer insulating film, and wherein the film containing the impurity element belonging to the group 15 of the periodic table further comprises a metallic element for promoting crystallization of the semiconductor film.