Patent ID: 8481373

Claim:
A method for manufacturing a thin film transistor substrate, comprising: a gate layer formation step of forming a gate electrode and a first interconnect on a substrate; a gate insulating film formation step of forming a first insulating film covering the gate electrode and the first interconnect, and thereafter, patterning the first insulating film to form a contact hole at a position overlapping the first interconnect, thereby forming a gate insulating film; a source layer formation step of forming a conductive film covering the gate insulating film, and thereafter, patterning the conductive film to form a source electrode and a drain electrode overlapping the gate electrode and separated apart from each other, and a second interconnect intersecting the first interconnect and connected via the contact hole to the first interconnect; an interlayer insulating film formation step of successively forming an oxide semiconductor film and a second insulating film covering the source electrode, the drain electrode, and the second interconnect, and thereafter, patterning the second insulating film to form an interlayer insulating film; and a pixel electrode formation step of reducing the resistance of the oxide semiconductor film exposed through the interlayer insulating film to form a pixel electrode.