Patent ID: 6274888
Filing Date: 2001-08-14
Classification: G02F,H01L

Abstract:
A semiconductor device having a thin film transistor comprising:an insulating substrate,an island made of a polycrystalline semiconductor material and disposed on said insulating substrate,a conductive layer made of said polycrystalline semiconductor material and at least one of metals and metallic silicides and surrounding said island,a source region and a drain region spaced from said source region,said source region and said drain region being formed in said island,a gate electrode disposed on said island with an insulating film interposed between said island and said gate electrode, said gate facing a spacing between said source region and said drain region,wherein said polycrystalline semiconductor material forming said island and said conductive layer are fabricated by initially annealing a first amorphous semiconductor material deposited on said insulating substrate with a crystallization-inducing layer made of said at least one of metals and metallic silicides and having a hole corresponding to said island, said crystallization-inducing layer being disposed on a surface of said amorphous semiconductor material on at least one of a substrate side thereof and a side thereof opposite from said substrate side, and then by depositing a second amorphous semiconductor material on said first amorphous semiconductor and annealing said second amorphous semiconductor material.