Patent ID: 8293590

Claim:
A method for manufacturing an active matrix substrate comprising: a wiring forming step comprising the steps of forming a first conductive layer, forming a second conductive layer on the first conductive layer, patterning the second conductive layer by performing selective etching on the second conductive layer with respect to a laminated film of the first conductive layer and the second conductive layer, and patterning the first conductive layer into a shape with a smaller line width than that of the second conductive layer by performing selective etching on the first conductive layer after patterning the second conductive layer; an interlayer insulating film forming step of forming an interlayer insulating film on the second conductive layer; and a conductive film forming step of forming a conductive film arranged in a matrix pattern on the interlayer insulating film such that the conductive film covers at least a portion of the second conductive layer.