Liquid crystal display device and method for manufacturing the same
AssigneesQuanta Display Inc., Quanta Display Japan Inc.
InventorsShigekazu Horino, Chun-hao Tung, Hsien-kai Tseng
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Abstract
The invention provides a novel technology where a TFT array substrate for a display device is formed with three photomasks. The invention is achieved by using the novel technology in combination with a well-known four-masks process. For the novel technology, during the lithography process where a photosensitive acrylic resin film is used to make contacts, taper patterns required for general through holes are formed simultaneously with a fine pattern formed in a light shielding area that is tapered more approximately to vertical, using a photomask with phase-shift effect. Thus the pixel electrode pattern can be separated without using lithography process in subsequent processes.
Claims8
A liquid crystal display device, comprising:
- a first transparent substrate with a light shielding area, comprising:
- a scan line, a data line, and a transistor formed on the first transparent substrate, the scan line and the data line respectively being coupled to a gate electrode and a source electrode of the transistor;
- a passivation layer formed over the first transparent substrate;
- an organic layer formed on the passivation layer, the organic layer including a through hole and a plurality of trenches, wherein the through hole extends to the bottom of the passivation layer, and the trenches correspond to the light shielding area;
- and
- a pixel electrode formed on the organic layer, the pixel electrode being electrically connected to a drain electrode of the transistor via the through hole;
- a second transparent substrate opposed to the first transparent substrate;
- and
- a liquid crystal layer between the first transparent substrate and the second transparent substrate.
A method for manufacturing a liquid crystal display device, comprising:
- providing a first transparent substrate with a light shielding area, comprising the steps of:
- forming a scan line, a data line, and a transistor on the first transparent substrate, the scan line and the data line being respectively coupled to a gate electrode and a source electrode of the transistor;
- forming a passivation layer over the first transparent substrate;
- forming an organic layer including a through hole and a plurality of trenches on the passivation layer, wherein the through hole extends to the bottom of the passivation layer, and the trenches corresponds to the light shielding area ;
- and
- forming a pixel electrode on the organic layer, the pixel electrode being electrically connected to a drain electrode of the transistor via the through hole;
- providing a second transparent substrate;
- and
- forming a liquid crystal layer between the first transparent substrate and the second transparent substrate.
Dependencies are inferred from the claim text.