Liquid-crystal display device
First Claim
1. A liquid-crystal display device comprising:
- a liquid-crystal cell including first and second substrates opposing each other and a liquid crystal sealed therebetween;
a plurality of transparent display electrodes formed on the inner surface of said first transparent substrate;
a plurality of thin-film transistors formed on said first transparent substrate and each having a drain electrode connected to one of said display electrodes;
transparent source bus lines formed on said first transparent substrate and each connected to transparent source electrodes of a certain number of said thin-film transistors, each said source bus line being formed integrally with the source electrode to which it is connected;
gate bus lines formed on said first transparent substrate and each connected to the gate electrodes of a certain number of said thin-film transistors; and
a transparent common electrode formed on the inner surface of said second transparent substrate;
the source and drain electrodes of each thin-film transistor having opposed sides constituted by tapered surfaces with the distance between said surfaces being progressively decreased as said tapered surfaces appproach said first transparent substrate;
ohmic contact layers formed over the entirety of said tapered surfaces; and
a semiconductor layer in each said thin-film transistor formed over said source and drain electrodes via said ohmic contact layers and extending between said source and drain electrodes.
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Accused Products
Abstract
A liquid-crystal cell is formed with first and second transparent substrates opposing each other and a liquid crystal sealed therebetween. A plurality of display electrodes are formed in a matrix arrangement with rows and columns on the inner surface of said first transparent substrate. Gate bus lines are formed on the first transparent substrate along the respective rows of display electrodes. Source bus lines are formed on the first transparent substrate along the respective columns of display electrodes. Thin-film transistors are formed on the first transparent substrate at the intersections of the gate and source bus lines. The thin-film transistors each have a gate electrode connected to the associated gate bus line, a source electrode connected to the associated source bus line and the drain electrode connected to a corresponding display electrode. A common electrode is formed on the second transparent substrate such that it faces the display electrodes. The opposed sides of the source and drain electrodes of each thin-film transistor are constituted by tapered surfaces with the distance therebetween being progressively decreased as they approach the first transparent substrate. Ohmic contact layers are formed on these tapered surfaces. A semiconductor of each thin-film transistor is formed over the source and drain electrodes via the ohmic contact layers.
36 Citations
11 Claims
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1. A liquid-crystal display device comprising:
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a liquid-crystal cell including first and second substrates opposing each other and a liquid crystal sealed therebetween; a plurality of transparent display electrodes formed on the inner surface of said first transparent substrate; a plurality of thin-film transistors formed on said first transparent substrate and each having a drain electrode connected to one of said display electrodes; transparent source bus lines formed on said first transparent substrate and each connected to transparent source electrodes of a certain number of said thin-film transistors, each said source bus line being formed integrally with the source electrode to which it is connected; gate bus lines formed on said first transparent substrate and each connected to the gate electrodes of a certain number of said thin-film transistors; and a transparent common electrode formed on the inner surface of said second transparent substrate; the source and drain electrodes of each thin-film transistor having opposed sides constituted by tapered surfaces with the distance between said surfaces being progressively decreased as said tapered surfaces appproach said first transparent substrate; ohmic contact layers formed over the entirety of said tapered surfaces; and a semiconductor layer in each said thin-film transistor formed over said source and drain electrodes via said ohmic contact layers and extending between said source and drain electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification