Patent ID: 8415678
Filing Date: 2013-04-09
Classification: G02F,H01L

Abstract:
1. A semiconductor device comprising: a thin film transistor that includes a semiconductor layer including a channel region, a source region, and a drain region, a gate electrode that controls conductivity of the channel region, and a gate insulating film disposed between the semiconductor layer and the gate electrode; and a thin film diode that includes a semiconductor layer including at least an n-type region and a p-type region, wherein the semiconductor layer of the thin film transistor and the semiconductor layer of the thin film diode are both crystalline semiconductor layers, wherein the semiconductor layer of the thin film transistor and the semiconductor layer of the thin film diode include portions formed by crystallizing a same amorphous semiconductor film, wherein a thickness of the semiconductor layer of the thin film diode is greater than a thickness of the semiconductor layer of the thin film transistor, wherein a difference between the thickness of the semiconductor layer of the thin film transistor and the thickness of the semiconductor layer of the thin film diode is greater than 25 nm, and wherein surface roughness of the semiconductor layer of the thin film diode is greater than surface roughness of the semiconductor layer of the thin film transistor.