Patent ID: 6900464

Claim:
A liquid crystal display device comprising: a first thin film transistor; a second thin film transistor, the first thin film transistor and the second thin film transistor being formed on a substrate; a pixel electrode connected to source/drain regions of the second thin film transistor; and a storage capacitor bus line that intersects with the pixel electrode; wherein the first thin film transistor includes a first island-like semiconductor film having a pair of source/drain regions formed to put a channel region therebetween, a first gate insulating film made of a first insulating film formed on the channel region of the first island-like semiconductor film, and a first gate electrode made of a first conductive film formed on the first gate insulating film, the second thin film transistor includes a second island-like semiconductor film having a pair of source/drain regions formed to put a channel region therebetween and any one of which is connected to the pixel electrode, a second gate insulating film made of the first insulating film and a second insulating film formed on the channel region of the second island-like semiconductor film, and a second gate electrode made of a second conductive film formed on the second gate insulating film, and the storage capacitor bus line is formed of the first conductive film, and the second insulating film and the second conductive film connected to the pixel electrode are laminated in this order in a partial area on the storage capacitor bus line.