Patent ID: 8901650
Filing Date: 2014-12-02
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, and 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, wherein a p-type impurity is introduced into only a part of the slope portion of the first semiconductor layer with higher density than the main portion of the first semiconductor layer, the main portion of the second semiconductor layer, and the slope portion of the second semiconductor layer, and wherein, when viewed from the normal direction of a surface of the one and the same substrate, the slope portion of the first semiconductor layer has a portion extending in a channel direction, and the p-type impurity is introduced into at least a portion of the portion extending in the channel direction which overlaps the gate electrode with higher density than the main portion of the first semiconductor layer.