Patent ID: 9490350
Filing Date: 2016-11-08
CPC Classification: G02F,H01L

Claim Text:
1. A method for manufacturing a liquid crystal display device, comprising the steps of: forming a gate electrode and a wiring over a substrate by a first photolithography step; forming a gate insulating layer over the gate electrode; forming a semiconductor layer over the gate insulating layer; forming a source electrode and a drain electrode over the semiconductor layer by a second photolithography step; forming an insulating layer over the source electrode and the drain electrode; forming a contact hole by selectively removing a first part of the insulating layer overlapping with the drain electrode and removing a second part of the insulating layer, part of the semiconductor layer, and part of the gate insulating layer, by a third photolithography step; and forming a pixel electrode over the insulating layer by a fourth photolithography step, wherein the second part of the insulating layer, the part of the semiconductor layer, and the part of the gate insulating layer each overlap with the wiring.