Patent ID: 6576924
Filing Date: 2003-06-10
Classification: G02F,H01L

Abstract:
A semiconductor device having at least a pixel unit and a drive circuit unit over a same substrate, comprising:a plurality of drive TFTs in said drive circuit unit, each of said plurality of drive TFTs comprising a semiconductor layer, a gate electrode adjacent to said semiconductor layer with a gate insulating film interposed therebetween; and a plurality of pixel TFTs in said pixel unit, each of said plurality of pixel TFTs comprising a semiconductor layer, a gate electrode adjacent to said semiconductor layer with a gate insulating film interposed therebetween, wherein said gate insulating film of said drive TFTs is thinner than said gate insulating film of said pixel TFTs, and wherein a concentration distribution of phosphorus in at least one of a source and a drain region of said drive TFTs is different from that of said pixel TFTs along a vertical direction with respect to a surface of said substrate.