Liquid crystal display device and method for manufacturing the same

Abstract

A liquid crystal display panelA of the invention has gate electrodes G of TFTs, scan lines, and auxiliary capacitor electrodes, which are coated with a first insulating filmcomposed of a thick insulating layerand thinned insulating layer. A part above the auxiliary capacitor electrodesis coated only with the thinned insulating layer, and drain electrodes D are extended on the first insulating film, which is not thinned, so as to coat the thinned insulating layer. On a second insulating filmprovided between the pixel electrodesand the drain electrodes D, contact holesare formed at portions above the drain electrodes D on the first insulating film, which is not thinned, above the auxiliary capacitor electrodes, and via the contact holes, the pixelsand the drain electrodes D are electrically coupled to each other. By providing such a constitution, a liquid crystal display device and its manufacturing method can be provided, with only a small number of bright point defects, and with an increased capacitance of the auxiliary capacitor electrodes without a reduction in the aperture ratio of each pixel.