Patent ID: 9496292
Filing Date: 2016-11-15
CPC Classification: H01L

Claim Text:
1. A liquid crystal display device, comprising: gate electrodes formed on a transparent substrate; a gate insulating film for covering said gate electrodes; an oxide semiconductor formed on said gate insulating film; drain electrodes and source electrodes formed at a distance from each other with channel regions in said oxide semiconductor in between; an interlayer capacitor film formed of an insulating film for covering said drain electrodes and source electrodes; common electrodes formed on top of said interlayer capacitor film; and pixel electrodes formed so as to face said common electrodes and connected to said source electrodes, wherein a side of said pixel electrodes opposing said common electrodes is in contact only with said interlayer capacitor film, an etching stopper layer for covering said channel regions is formed between said oxide semiconductor and said drain electrodes and source electrodes, said drain electrodes are comprised of a multilayer film including a transparent conductive film and a metal film layered on top of each other, said drain electrodes and source electrodes make direct contact with said oxide semiconductor, the entirety of said oxide semiconductor overlaps said gate electrode as viewed from the top, and said source electrodes and said pixel electrodes are integrally formed of the same transparent conductive film, and said etching stopper layer is tapered in the vertical direction in a cross-section at an angle of 10 degrees or greater and 75 degrees or less to prevent disconnection of the etching stopper layer at points of contact between the etching stopper layer and the source and drain electrodes.