Patent ID: 6933989

Claim:
A manufacturing method for a liquid crystal display device comprising the steps of: forming, on a substrate, gate signal lines each made of a stacked structure in which a transparent conductive film is stacked on the substrate and a metal layer is stacked on the transparent conductive film; forming an insulating film to cover the gate signal lines; forming, on the insulating film, a stacked structure in which a semiconductor layer is stacked on the insulating film, a high-concentration layer is stacked on the semiconductor layer, and a conductive layer is stacked on the high-concentration layer; performing selective etching of the conductive layer and the high-concentration layer by using a half-exposure method, to form drain electrodes and source electrodes for thin film transistors as well as drain signal lines and to perform selective etching of the semiconductor layer; forming pixel electrodes each of which is in part directly superposed on the source electrode of the corresponding one of the thin film transistors; and forming a protective film and opening, in the protective film, apertures for exposing the respective pixel electrodes.