Semiconductor device and method of fabricating the same
DCFirst Claim
Patent Images
1. A display device comprising:
- a first substrate;
a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate;
an interlayer insulating film over the thin film transistor;
a first alignment film over the interlayer insulating film;
a second substrate;
a plurality of spacers over the second substrate;
a second alignment film on the plurality of spacers and over the second substrate; and
a liquid crystal material interposed between the first alignment film and the second alignment film;
wherein each of the plurality of spacers has a first end, a second end between the first end and the second substrate, and a center portion between the first end and the second end,wherein a width of the second end is larger than a width of the center portion, andwherein a taper portion is formed at the second end.
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Abstract
There is provided a high quality liquid crystal panel having a thickness with high accuracy, which is designed, without using a particulate spacer, within a free range in accordance with characteristics of a used liquid crystal and a driving method, and is also provided a method of fabricating the same. The shape of a spacer for keeping a substrate interval constant is made such that it is a columnar shape, a radius R of curvature is 2 μm or less, a height H is 0.5 μm to 10 μm, a diameter is 20 μm or less, and an angle α is 65° to 115°. By doing so, it is possible to prevent the lowering of an opening rate and the lowering of light leakage due to orientation disturbance.
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Citations
124 Claims
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1. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a first alignment film over the interlayer insulating film; a second substrate; a plurality of spacers over the second substrate; a second alignment film on the plurality of spacers and over the second substrate; and a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the second substrate, and a center portion between the first end and the second end, wherein a width of the second end is larger than a width of the center portion, and wherein a taper portion is formed at the second end. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a first alignment film over the interlayer insulating film; a second substrate; a plurality of spacers over the second substrate; a second alignment film on the plurality of spacers and over the second substrate; and a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the second substrate, and a center portion between the first end and the second end, wherein a width of the second end is larger than a width of the center portion, wherein a taper portion is formed at the second end, and wherein an angle between a tangent plane at a center portion and a surface of the second substrate is 65°
to 115°
. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a first alignment film over the interlayer insulating film; a second substrate; a plurality of spacers over the second substrate; a second alignment film on the plurality of spacers and over the second substrate; and a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the second substrate, and a center portion between the first end and the second end, wherein a width of the second end is larger than a width of the center portion, wherein a taper portion is formed at the second end, and wherein a height of the spacer is 0.5 μ
m to 110 μ
m. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a first alignment film over the interlayer insulating film; a second substrate; a plurality of spacers over the second substrate; a second alignment film on the plurality of spacers and over the second substrate; and a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the second substrate, and a center portion between the first end and the second end, wherein a width of the second end is larger than a width of the center portion, wherein a taper portion is formed at the second end, and wherein a radius of curvature of an edge between a upper surface and a side surface of each of the plurality of spacers is 2 μ
m or less. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a plurality of spacers over the interlayer insulating film; a first alignment film on the plurality of spacers and over the interlayer insulating film; a second substrate; a second alignment film over the second substrate; and a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the first substrate, and a center portion between the first end and the second end, wherein a width of the second end is larger than a width of the center portion, and wherein a taper portion is formed at the second end. - View Dependent Claims (26, 27, 28, 29, 30)
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31. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a first alignment film over the interlayer insulating film; a second substrate; a conductive film over the substrate; a plurality of spacers on the conductive film; a second alignment film on the plurality of spacers and on the conductive film; and a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the second substrate, wherein a contact surface between the second alignment film and the spacer is continuously connected to a contact surface between the second alignment film and the conductive film, and wherein a taper portion is formed at the second end. - View Dependent Claims (32, 33, 34, 35, 36, 37)
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38. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a first alignment film over the interlayer insulating film; a second substrate; a conductive film over the substrate; a plurality of spacers on the conductive film; a second alignment film on the plurality of spacers and on the conductive film; and a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the second substrate, wherein a contact surface between the second alignment film and the spacer is continuously connected to a contact surface between the second alignment film and the conductive film, wherein a taper portion is formed at the second end, and wherein an angle between a tangent plane at a center portion and a surface of the second substrate is 65°
to 115°
. - View Dependent Claims (39, 40, 41, 42, 43, 44)
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45. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a first alignment film over the interlayer insulating film; a second substrate; a conductive film over the substrate; a plurality of spacers on the conductive film; a second alignment film on the plurality of spacers and on the conductive film; and a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the second substrate, wherein a contact surface between the second alignment film and the spacer is continuously connected to a contact surface between the second alignment film and the conductive film, wherein a taper portion is formed at the second end, and wherein a height of the spacer is 0.5 μ
m to 110 μ
m. - View Dependent Claims (46, 47, 48, 49, 50, 51)
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52. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a first alignment film over the interlayer insulating film; a second substrate; a conductive film over the substrate; a plurality of spacers on the conductive film; a second alignment film on the plurality of spacers and on the conductive film; and a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the second substrate, wherein a contact surface between the second alignment film and the spacer is continuously connected to a contact surface between the second alignment film and the conductive film, wherein a taper portion is formed at the second end, and wherein a radius of curvature of an edge between a upper surface and a side surface of each of the plurality of spacers is 2 μ
m or less. - View Dependent Claims (53, 54, 55, 56, 57, 58)
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59. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a plurality of spacers on the interlayer insulating film; a first alignment film on the plurality of spacer and on the interlayer insulating film; a second substrate; a second alignment film over second substrate; and a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the first substrate, wherein a contact surface between the second alignment film and the spacer is continuously connected to a contact surface between the second alignment film and the interlayer insulating film, and wherein a taper portion is formed at the second end. - View Dependent Claims (60, 61, 62, 63, 64)
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65. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a first alignment film over the interlayer insulating film; a second substrate; a plurality of spacers over the second substrate; a second alignment film on the plurality of spacers and over the second substrate; a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the second substrate, a center portion between the first end and the second end, and a lower portion between the center portion and the second end, wherein an angle between a tangent plane at a center portion and a surface of the second substrate is larger than an angle between a tangent plane at a lower portion and the surface of the second substrate. - View Dependent Claims (66, 67, 68, 69, 70)
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71. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a first alignment film over the interlayer insulating film; a second substrate; a plurality of spacers over the second substrate; a second alignment film on the plurality of spacers and over the second substrate; a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the second substrate, a center portion between the first end and the second end, and a lower portion between the center portion and the second end, wherein an angle between a tangent plane at a center portion and a surface of the second substrate is larger than an angle between a tangent plane at a lower portion and the surface of the second substrate, and wherein an angle between a tangent plane at a center portion and a surface of the second substrate is 65°
to 115°
. - View Dependent Claims (72, 73, 74, 75, 76)
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77. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a first alignment film over the interlayer insulating film; a second substrate; a plurality of spacers over the second substrate; a second alignment film on the plurality of spacers and over the second substrate; a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the second substrate, a center portion between the first end and the second end, and a lower portion between the center portion and the second end, wherein an angle between a tangent plane at a center portion and a surface of the second substrate is larger than an angle between a tangent plane at a lower portion and the surface of the second substrate, and wherein a height of the spacer is 0.5 μ
m to 110 μ
m. - View Dependent Claims (78, 79, 80, 81, 82)
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83. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a first alignment film over the interlayer insulating film; a second substrate; a plurality of spacers over the second substrate; a second alignment film on the plurality of spacers and over the second substrate; a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the second substrate, a center portion between the first end and the second end, and a lower portion between the center portion and the second end, wherein an angle between a tangent plane at a center portion and a surface of the second substrate is larger than an angle between a tangent plane at a lower portion and the surface of the second substrate, and wherein a radius of curvature of an edge between a upper surface and a side surface of each of the plurality of spacers is 2 μ
m or less. - View Dependent Claims (84, 85, 86, 87, 88)
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89. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a plurality of spacers over the interlayer insulating film; a first alignment film on the plurality of spacers and over the interlayer insulating film; a second substrate; a second alignment film over the second substrate; a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the first substrate, a center portion between the first end and the second end, and a lower portion between the center portion and the second end, wherein an angle between a tangent plane at a center portion and a surface of the first substrate is larger than an angle between a tangent plane at a lower portion and the surface of the first substrate. - View Dependent Claims (90, 91, 92, 93, 94)
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95. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a first alignment film over the interlayer insulating film; a second substrate; a plurality of spacers over the second substrate; a second alignment film on the plurality of spacers and over the second substrate; and a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the second substrate, and a center portion between the first end and the second end, wherein a width of the second end L2 and a width of the center portion L1 are set in the range of 1<
L2/L1<
2.5. - View Dependent Claims (96, 97, 98, 99, 100)
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101. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a first alignment film over the interlayer insulating film; a second substrate; a plurality of spacers over the second substrate; a second alignment film on the plurality of spacers and over the second substrate; and a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the second substrate, and a center portion between the first end and the second end, wherein a width of the second end L2 and a width of the center portion L1 are set in the range of 1<
L2/L1<
2.5, andwherein an angle between a tangent plane at a center portion and a surface of the second substrate is 65°
to 115°
. - View Dependent Claims (102, 103, 104, 105, 106)
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107. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a first alignment film over the interlayer insulating film; a second substrate; a plurality of spacers over the second substrate; a second alignment film on the plurality of spacers and over the second substrate; and a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the second substrate, and a center portion between the first end and the second end, wherein a width of the second end L2 and a width of the center portion L1 are set in the range of 1<
L2/L1<
2.5, andwherein a height of the spacer is 0.5 μ
m to 110 μ
m. - View Dependent Claims (108, 109, 110, 111, 112)
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113. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a first alignment film over the interlayer insulating film; a second substrate; a plurality of spacers over the second substrate; a second alignment film on the plurality of spacers and over the second substrate; and a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the second substrate, and a center portion between the first end and the second end, wherein a width of the second end L2 and a width of the center portion L1 are set in the range of 1<
L2/L1<
2.5, andwherein a radius of curvature of an edge between a upper surface and a side surface of each of the plurality of spacers is 2 μ
m or less. - View Dependent Claims (114, 115, 116, 117, 118)
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119. A display device comprising:
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a first substrate; a plurality of pixels arranged in a matrix, each of which comprises a thin film transistor over the first substrate; an interlayer insulating film over the thin film transistor; a plurality of spacers over the interlayer insulating film; a first alignment film on the plurality of spacers over the interlayer insulating film; a second substrate; a second alignment film over the second substrate; and a liquid crystal material interposed between the first alignment film and the second alignment film; wherein each of the plurality of spacers has a first end, a second end between the first end and the first substrate, and a center portion between the first end and the second end, wherein a width of the second end L2 and a width of the center portion L1 are set in the range of 1<
L2/L1<
2.5. - View Dependent Claims (120, 121, 122, 123, 124)
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Specification