Patent ID: 7573538

Claim:
A liquid crystal display device comprising: a transparent substrate; multiple signal lines and multiple scan lines provided in a matrix on the transparent substrate; multiple auxiliary capacitor lines provided in between the scan lines in parallel with the scan lines; a thin film transistor including a source electrode, a gate electrode and a drain electrode provided near each intersection of the signal lines and the scan lines; and a pixel electrode provided in each area defined by the signal lines and the scan lines, the pixel electrode electrically coupled to the drain electrode of the thin film transistor; the gate electrode of the thin film transistor, the scan lines, and the auxiliary capacitor lines being covered with a first insulating film, and a thinned insulating layer is formed as a part of the first insulating film on the auxiliary capacitor lines; the drain electrode being extended on the first insulating film so as to cover surfaces of a thick insulating layer and the thinned insulating layer of the first insulating film; a second insulating film being formed in between the pixel electrode and the drain electrode; a portion defining a contact hole being formed in the second insulating film positioned on the drain electrode on the thick insulating layer of the first insulating film; and the pixel electrode and the drain electrode being electrically coupled via the contact hole.