Patent ID: 7525605

Claim:
A liquid crystal display device comprising: a plurality of signal lines and a plurality of scanning lines that are arranged on a transparent substrate so as to form a matrix; pixel regions that correspond to regions partitioned by the signal lines and the scanning lines; a plurality of auxiliary capacitance lines that are formed so as to be parallel with the scanning lines, the plurality of auxiliary capacitance lines being provided with auxiliary capacitance electrode portions, one for each of the pixel regions; upper auxiliary capacitance electrodes that are provided one for each of the auxiliary capacitance electrode portions; thin-film transistors that are provided one for each of the pixel regions; pixel electrodes that are electrically connected to drain electrodes of the thin-film transistors; terminal portions that are formed on the transparent substrate for receiving a signal from an outside; and a first insulating film, a second insulating film, and a third insulating film that are formed on the transparent substrate, wherein, in each of the auxiliary capacitance electrode portions, the first insulating film has a window portion, the second insulating film is formed on a surface of the first insulating film in such a way as to cover the window portion, the upper auxiliary capacitance electrode is formed on a surface of the second insulating film, the third insulating film is formed on a surface of the upper auxiliary capacitance electrode, the third insulating film has an auxiliary capacitance contact hole formed therein, and the upper auxiliary capacitance electrode and the pixel electrode are electrically connected via the auxiliary capacitance contact hole, wherein, in each of the terminal portions, in the first insulating film, the second insulating film, and the third insulating film that are laid on top of another, a terminal-portion contact hole is formed in which an edge of an opening in the first insulating film is coated with the second insulating film.