Patent ID: 6429485
Filing Date: 2002-08-06
Classification: H01L

Abstract:
CMOS thin film transistors, comprising:a substrate; a first-typed transistor comprising: an active layer having a heavily-doped impurity region, a lightly-doped impurity region and a channel region; a first gate insulating layer including a first part having a first thickness and a second part having a second thickness, the first part substantially overlapping with the heavily-doped impurity region, the second part substantially overlapping with the lightly-doped impurity region, wherein the first part is thinner than the second part; and a gate electrode arranged above the gate insulating layer over the channel region; a second-typed transistor comprising: an active layer having a heavily-doped impurity region and a channel region on the substrate, without a lightly-doped region; a second gate insulating layer having a length substantially the same as the gate electrode; and a gate electrode arranged above the second gate insulating layer over the channel region; and a conductor electrically interconnecting said active layer of said first-typed transistor with said active layer of said second-typed transistor.