LIQUID CRYSTAL DISPLAY DEVICE
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Abstract
A method of manufacturing, with high mass productivity, liquid crystal display devices having highly reliable thin film transistors with excellent electric characteristics is provided. In a liquid crystal display device having an inverted staggered thin film transistor, the inverted staggered thin film transistor is formed as follows: a gate insulating film is formed over a gate electrode; a microcrystalline semiconductor film which functions as a channel formation region is formed over the gate insulating film; a buffer layer is formed over the microcrystalline semiconductor film; a pair of source and drain regions are formed over the buffer layer; and a pair of source and drain electrodes are formed in contact with the source and drain regions so as to expose a part of the source and drain regions.
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Citations
21 Claims
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1. (canceled)
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2. A liquid crystal display device comprising:
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a gate wiring; a transistor comprising a first semiconductor layer and a part of the gate wiring; a liquid crystal element comprising a first electrode, a second electrode, and a liquid crystal; a first color layer; a second color layer; a third color layer; and a spacer including a first region, wherein the spacer is overlapped by the first color layer, the second color layer, and the third color layer, wherein the first electrode is not overlapped by the first region, wherein the first electrode is electrically connected to the transistor, wherein the part of the gate wiring is overlapped by the spacer, and wherein the gate wiring is overlapped by the first color layer, the second color layer, the third color layer and the spacer. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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9. A liquid crystal display device comprising:
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a gate wiring; a transistor comprising a first semiconductor layer and a part of the gate wiring; a liquid crystal element comprising a first electrode, a second electrode, and a liquid crystal; a first color layer; a second color layer; a third color layer; a light shielding film; and a spacer including a first region, wherein the spacer is overlapped by the first color layer, the second color layer, and the third color layer, wherein the first electrode is not overlapped by the first region, wherein the first electrode is electrically connected to the transistor, wherein the part of the gate wiring is overlapped by the spacer, and wherein the gate wiring is overlapped by the first color layer, the second color layer, the third color layer, the light shielding film and the spacer. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A liquid crystal display device comprising:
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a gate wiring; a transistor comprising a first semiconductor layer, a second semiconductor layer including an impurity element imparting one conductivity type, and a part of the gate wiring; a liquid crystal element comprising a first electrode, a second electrode, and a liquid crystal; a first color layer; a second color layer; a third color layer; a light shielding film; and a spacer including a first region, wherein the spacer is overlapped by the first color layer, the second color layer, and the third color layer, wherein the first electrode is not overlapped by the first region, wherein the first electrode is electrically connected to the transistor, wherein the part of the gate wiring is overlapped by the spacer, wherein the gate wiring is overlapped by the first color layer, the second color layer, the third color layer, the light shielding film, and the spacer, and wherein the second semiconductor layer includes a microcrystalline semiconductor. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification