Patent ID: 8946004
Filing Date: 2015-02-03
Classification: G02F,H01L

Abstract:
1. A method for manufacturing a contact portion of wiring, the method comprising: forming a conductive layer on a substrate; sequentially forming a lower insulating layer and an upper insulating layer on the conductive layer; patterning the upper insulating layer to form a primary contact hole exposing the lower insulating layer; etching the lower insulating layer by using the patterned upper insulating layer as a mask to form a contact hole exposing the conductive layer; selectively forming a metal layer to fill the contact hole through electroless plating in a state that a width of the contact hole in the upper insulating layer is smaller than that of the contact hole of the lower insulating layer; and forming a transparent electrode connected to the metal layer on the upper insulating layer, wherein the selectively forming the metal layer includes forming the metal layer having a thickness thicker than that of the lower insulating layer, and wherein the forming the metal layer inside the contact hole through electroless plating includes filling the contact hole having an undercut under the upper insulating layer with the metal layer.