Patent ID: 8541844
Filing Date: 2013-09-24
Classification: G02F,H01L

Abstract:
1. A semiconductor device comprising: at least a first n-channel thin film transistor being formed in a display region over a substrate; at least a second n-channel thin film transistor and at least a p-channel thin film transistor in a drive circuit each being formed in a periphery of the display region over the substrate; and a capacitor forming electrode formed adjacent to a portion of a crystalline semiconductor film to form a capacitor; the first n-channel thin film transistor includes: gate electrodes formed over the substrate, a first insulating film formed over the gate electrodes, a second insulating film comprising silicon oxide formed over the first insulating film, the crystalline semiconductor film formed over the second insulating film, wherein the first insulating film comprises silicon nitride, wherein the first n-channel thin film transistor has first and second channel regions, and source and drain regions, and wherein a channel length of the p-channel thin film transistor is shorter than that of the second n-channel thin film transistor.