Patent ID: 7749688
Filing Date: 2010-07-06
Classification: G02F,G03B,G03F

Abstract:
1. A method of producing a liquid crystal display device of transverse electric-field type including (a) a pair of substrates at least one of which is transparent, (b) a layer of a liquid crystal composition interposed between the pair of substrates, (c) a plurality of scanning lines driven by an external scanning-line driver circuit through scanning-line terminal portions and extending in a line direction, (d) a plurality of image-signal wires extending in a column direction, (e) picture-element electrodes corresponding to respective picture elements, (f) common electrodes cooperating with said picture-element electrodes, and (g) thin-film transistor elements connected to said scanning lines and said image-signal wires, comprising the following steps of: providing said scanning lines, said image-signal wires, said picture-element electrodes, said common electrodes and said thin-film transistor elements on a surface of one of said pair of substrates which faces said layer of the liquid crystal composition forming, through a halftone exposure procedure, first positive resist portions that cover portions of a semiconductor layer, formed on said one substrate, which portions correspond to said thin-film transistor elements, each of said first positive resist portions having a predetermined first thickness, forming, through the halftone exposure procedure, resist-free areas that cover portions of said semiconductor layer which correspond to a first connecting portion, a second connecting portion and a third connecting portion, said first connecting portion being provided to form first static-electricity protective transistor elements connecting said common electrodes and said scanning lines, said second connecting portion being provided to form second static-electricity protective transistor elements connecting said common electrodes and said image-signal wires, and said third connecting portion connecting said external scanning-line driver circuit and said scanning-line terminal portions, and forming, through the halftone exposure procedure, second positive resist portions having a second thickness smaller than said first thickness and covering the other portions of said semiconductor layer, and wherein each of said first connecting portion, second connecting portion and third connecting portion is a contact groove elongated in plan view established on the substrate; and wherein said first and second connecting portions have widths of said contact grooves which are about ½ to about 1/100 of that of said third connecting portion.