Patent ID: 9117704
Filing Date: 2015-08-25
Classification: H01L

Abstract:
1. A semiconductor device comprising an n-channel first thin film transistor and a p-channel second thin film transistor on one and the same substrate, wherein the first thin film transistor includes: a first semiconductor layer having a channel region, a source region, and a drain region; a gate electrode disposed to overlap the channel region; and a gate insulating film disposed between the semiconductor layer and the gate electrode, the second thin film transistor includes: a second semiconductor layer having a channel region, a source region, and a drain region; a gate electrode disposed to overlap the channel region; and a gate insulating film disposed between the semiconductor layer and the gate electrode, the first and the second semiconductor layers are formed from one and the same film, each of the first and the second semiconductor layers has a slope portion positioned in the periphery and a main portion which is a portion excluding the slope portion, and a p-type impurity is introduced into the entirety of the slope portion of the first semiconductor layer and only a part of the slope portion of the second semiconductor layer with higher density than the main portion of the first semiconductor layer and the main portion of the second semiconductor layer.