Liquid crystal display device having more uniform seal heights and its fabricating method
View Patent ↗A liquid crystal display device, and a fabricating method thereof, that is capable of providing uniform liquid cell gaps. A main seal defines a liquid crystal injection area. A first step coverage-compensating layer is provided between a substrate on which the main seal has been coated and the main seal. A plurality of dummy seals is arranged external to the main seal. A second step coverage-compensating layer having the same thickness as the first step coverage-compensating layer is provided between the substrate on which the dummy seals are arranged and the dummy seals. Accordingly, a main seal and dummy seals having the same thickness produce uniform liquid crystal cell gaps. The liquid crystal display device is beneficially made by a fabrication process employing four or five masks.
1. A liquid crystal display device, comprising:
a first substrate;
a main seal on the first substrate and defining a liquid crystal injection area;
a first compensating layer under the main seal, said first compensating layer providing a step upon which the main seal is raised;
a plurality of dummy seals on the first substrate and external to the liquid crystal injection area; and
a second compensating layer under the plurality of dummy seals, the second compensating layer providing a step upon which the dummy seals are raised and having substantially a same structure as the first compensating layer.
2. The liquid crystal display device according to claim 1 , wherein the main seal is provided with a liquid crystal injection hole through which a liquid crystal can be injected.
3. The liquid crystal display device according to claim 1 , wherein the main seal and the dummy seals have a same thickness.
4. The liquid crystal display device according to claim 1 , wherein the first compensating layer has a thickness of about 6500 Å.
5. The liquid crystal display device according to claim 1 , wherein a top of the main seal and tops of the dummy seals are a same distance from the first substrate.
6. The liquid crystal display device according to claim 1 , further comprising:
a gate metal pattern on the substrate forming a gate line and a gate electrode; and
a gate-insulating layer covering the gate metal pattern.
7. The liquid crystal display device according to claim 6 , wherein the first and second compensating layers include the gate metal pattern and the gate-insulating layer.
8. The liquid crystal display device according to claim 6 , wherein the main seal and the dummy seals are formed on the gate-insulating layer.
9. A liquid crystal display device, comprising:
a first substrate;
a main seal on the first substrate and defining a liquid crystal injection area;
a first compensating layer with a width substantially the same as a width of the main seal disposed between the first substrate and the main seal;
a plurality of dummy seals on the first substrate and external to the liquid crystal injection area; and
a second compensating layer with a width substantially the same as a width of the dummy seals disposed between the first substrate and the plurality of dummy seals, the second compensating layer having substantially a same structure as the first compensating layer.
10. The liquid crystal display device according to claim 9 , wherein the main seal is provided with a liquid crystal injection hole through which a liquid crystal can be injected.
11. The liquid crystal display device according to claim 9 , wherein the main seal and the dummy seals have a same thickness.
12. The liquid crystal display device according to claim 9 , wherein the first compensating layer has a thickness of about 6500 Å.
13. The liquid crystal display device according to claim 9 , wherein a top of the main seal and tops of the dummy seals are a same distance from the first substrate.
14. The liquid crystal display device according to claim 9 , further comprising:
a gate metal pattern on the substrate forming a gate line and an gate electrode; and
a gate-insulating layer covering the gate metal pattern.
15. The liquid crystal display device according to claim 14 , wherein the first and second compensating layers include the gate metal pattern and the gate-insulating layer.
16. The liquid crystal display device according to claim 14 , wherein the main seal and the dummy seals are formed on the gate-insulating layer.