Patent ID: 9406630
Filing Date: 2016-08-02
CPC Classification: G02F,H01L

Claim Text:
1. A contact portion of wiring, comprising: a substrate; a conductive layer disposed on the substrate; an interlayer insulating layer disposed on the conductive layer and having a contact hole, wherein the interlayer insulating layer comprises a lower insulating layer and an upper insulating layer disposed on the lower insulating layer and the lower insulating layer is undercut at the contact hole; a metal layer disposed on the conductive layer and filling the contact hole, wherein the metal layer is disposed to fill in the portion of the contact hole where the lower insulating layer is undercut ; and a transparent electrode disposed on the metal layer and connected to the metal layer, wherein the metal layer has a thickness thicker than that of the lower insulating layer and is formed of different material from the transparent electrode.