Liquid crystal display device and method for manufacturing the same
First Claim
1. A liquid crystal display device, comprising:
- a transparent substrate;
a plurality of signal lines and scan lines arranged on said transparent substrate in a matrix;
a plurality of auxiliary capacitor lines provided between said scan lines so as to be in parallel with said scan lines;
thin film transistors each provided in a vicinity of an intersection of said signal lines and scan lines; and
pixel electrodes arranged in respective positions defined by said signal lines and said scan lines and each electrically connected to a drain electrode of said thin film transistor, said thin film transistor'"'"'s gate electrode and said scan line being covered by a gate insulating film, and said thin film transistor'"'"'s drain electrode extending to overlie said auxiliary capacitor line, with an insulating layer having a smaller thickness than that of said gate insulating film being interposed between the drain electrode and said auxiliary capacitor line.
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Accused Products
Abstract
A liquid crystal display device 10 includes: a transparent substrate 11; a plurality of signal lines 17 and scan lines 16 arranged on the transparent substrate 11 in a matrix; a plurality of auxiliary capacitor lines 18 provided between the scan lines 16 so as to be in parallel with the scan lines 16; thin film transistors (TFTs) each provided in a vicinity of an intersection of the signal lines 17 and scan lines 16; and pixel electrodes 20 arranged in respective positions defined by the signal lines 17 and the scan lines 16 and each electrically connected to a drain electrode D of the thin film transistor (TFT); in which the thin film transistor (TFT)'"'"'s gate electrode G and the scan line 16 are covered by a gate insulating film formed by an insulating film (a first layer) 25 and an insulating layer (a second layer) 26, and the drain electrode D of the thin film transistor (TFT) extends to overlie an auxiliary capacitor electrode 18a, with the insulating layer (the second layer) 26 interposed between the drain electrode D and the auxiliary capacitor electrode 18a. As a result, it will be possible to provide a liquid crystal display device and a method for manufacturing the same are provided, in which the capacitance of an auxiliary capacitor electrode is increased without reducing the aperture ratio of each pixel and which is suitable to realize a relatively small pixel area and high definition.
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Citations
19 Claims
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1. A liquid crystal display device, comprising:
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a transparent substrate;
a plurality of signal lines and scan lines arranged on said transparent substrate in a matrix;
a plurality of auxiliary capacitor lines provided between said scan lines so as to be in parallel with said scan lines;
thin film transistors each provided in a vicinity of an intersection of said signal lines and scan lines; and
pixel electrodes arranged in respective positions defined by said signal lines and said scan lines and each electrically connected to a drain electrode of said thin film transistor, said thin film transistor'"'"'s gate electrode and said scan line being covered by a gate insulating film, and said thin film transistor'"'"'s drain electrode extending to overlie said auxiliary capacitor line, with an insulating layer having a smaller thickness than that of said gate insulating film being interposed between the drain electrode and said auxiliary capacitor line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for manufacturing a liquid crystal display device, the method comprising:
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(a) arranging, on a transparent substrate, a plurality of scan lines connecting with gate electrodes and a plurality of auxiliary capacitor lines so as to be in parallel with each other;
(b) forming a gate insulating film so as to cover the entire area of said transparent substrate;
(c) making thinner a portion of said gate insulating film to form an insulating layer with a smaller thickness than that of the region surrounding said auxiliary capacitor line, said portion being positioned above said auxiliary capacitor line; and
(d) forming a drain electrode of a thin film transistor above said gate insulating film and extending said drain electrode of said thin film transistor so as to cover said insulating layer positioned above said auxiliary capacitor line, thereby forming an auxiliary capacitor. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification