Liquid crystal display device and manufacturing method thereof
First Claim
1. A liquid crystal display device comprising:
- a first substrate having a pixel portion;
a TFT over the first substrate;
a pixel electrode over the first substrate and electrically connected to the TFT;
a second substrate opposite to the first substrate;
a transparent conductive film over the second substrate;
a plurality of spacers formed over the transparent conductive film and located between the first substrate and the second substrate, wherein the plurality of the spacers are arranged in a stripe shape;
a sealing material bonding the first substrate and the second substrate, the sealing surrounding the pixel portion; and
a liquid crystal material between the first substrate and the second substrate,wherein each of the plurality of the spacers is in a straight line shape and has a first surface facing the first substrate, a second surface facing the second substrate and a sloped surface having a curved portion, the second surface being larger than the first surface, andwherein the first surface and the second surface are substantially parallel to each other.
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Abstract
An electro-optical device typified by an active matrix type liquid crystal display device, is manufactured by cutting a rubbing process, and in addition, a reduction in the manufacturing cost and an improvement in the yield are realized by reducing the number of process steps to manufacture a TFT. By forming a pixel TFT portion having a reverse stagger type n-channel TFT, and a storage capacitor, by performing three photolithography steps using three photomasks, and in addition, by having a uniform cell gap by forming wall-like spacers by performing one photolithography step, without performing a rubbing process, a multi-domain perpendicular orientation type liquid crystal display device having a wide viewing angle display, and in which a switching direction of the liquid crystal molecules is controlled, can be realized.
267 Citations
15 Claims
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1. A liquid crystal display device comprising:
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a first substrate having a pixel portion; a TFT over the first substrate; a pixel electrode over the first substrate and electrically connected to the TFT; a second substrate opposite to the first substrate; a transparent conductive film over the second substrate; a plurality of spacers formed over the transparent conductive film and located between the first substrate and the second substrate, wherein the plurality of the spacers are arranged in a stripe shape; a sealing material bonding the first substrate and the second substrate, the sealing surrounding the pixel portion; and a liquid crystal material between the first substrate and the second substrate, wherein each of the plurality of the spacers is in a straight line shape and has a first surface facing the first substrate, a second surface facing the second substrate and a sloped surface having a curved portion, the second surface being larger than the first surface, and wherein the first surface and the second surface are substantially parallel to each other. - View Dependent Claims (2, 3, 4, 5)
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6. A liquid crystal display device comprising:
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a first substrate having a pixel portion; a pixel electrode over the first substrate; a second substrate opposite to the first substrate; a transparent conductive film over the second substrate; a plurality of spacers formed over the transparent conductive film and located between the first substrate and the second substrate, wherein the plurality of the spacers are arranged in a stripe shape; a sealing material bonding the first substrate and the second substrate, the sealing surrounding the pixel portion; and a liquid crystal material between the first substrate and the second substrate, wherein each of the plurality of the spacers is in a straight line shape and has a first surface facing the first substrate, a second surface facing the second substrate and a sloped surface having a curved portion, the second surface being larger than the first surface, and wherein the first surface and the second surface are substantially parallel to each other. - View Dependent Claims (7, 8, 9, 10)
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11. A liquid crystal display device comprising:
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a first substrate having a pixel portion; a second substrate opposite to the first substrate; a transparent conductive film over the second substrate; a plurality of spacers formed over the transparent conductive film and located between the first substrate and the second substrate, wherein the plurality of the spacers are arranged in a stripe shape; a sealing material bonding the first substrate and the second substrate, the sealing surrounding the pixel portion; and a liquid crystal material between the first substrate and the second substrate, wherein each of the plurality of the spacers is in a straight line shape and has a first surface facing the first substrate, a second surface facing the second substrate and a sloped surface having a curved portion, the second surface being larger than the first surface, and wherein the first surface and the second surface are substantially parallel to each other. - View Dependent Claims (12, 13, 14, 15)
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Specification