Liquid crystal display device and method of manufacturing the same
View Patent ↗Provided is an LCD that can be manufactured by a simplified process. The LCD includes first and second substrates, and a liquid crystal layer interposed between the first and second substrates. TFTs are formed in a pixel region defined on the first substrate. A photosensitive material is coated on each of the TFTs, and light is irradiated by a photo mask including a full open region, a half open region and a closed region. Accordingly, the photosensitive material is removed from the pixel region, and a passivation layer and a spacer are simultaneously formed on each of the TFTs. A transparent conductive pattern is formed on the spacer together with a pixel electrode formed in the pixel region, and is electrically connected to a common electrode of the second substrate.
1. An liquid crystal display device (LCD) comprising:
first and second substrates facing each other and including a plurality of pixel regions arranged in a matrix;
a liquid crystal layer interposed between the first and second substrates;
a gate insulating layer formed on the first substrate;
a plurality of TFTs formed on the pixel regions on the first substrate;
a passivation layer formed on the TFTs; and
a pixel electrode connected to each TFT; and
a spacer integrally formed with the passivation layer,
wherein the passivation layer is not formed in the pixel region; and
wherein the pixel electrode is formed to contact the gate insulting layer in the pixel region.
2. The LCD according to claim 1 , wherein the spacer is formed on the TFT.
3. The LCD according to claim 1 , wherein the spacer is a patterned spacer.
4. The LCD according to claim 1 , further comprising a transparent conductive pattern formed on the spacer.
5. The LCD according to claim 4 , wherein the transparent conductive pattern is formed in a peripheral region of the first substrate.
6. The LCD according to claim 4 , wherein the transparent conductive pattern is electrically connected to a common electrode of the second substrate.
7. The LCD according to claim 4 , wherein the transparent conductive pattern is formed of a same material as a pixel electrode electrically connected to the TFT.
8. The LCD according to claim 1 , further comprising a pixel electrode formed in each of the pixel regions on the first substrate and connected to the TFT.
9. The LCD according to claim 1 , wherein the passivation layer and the spacer are formed of a same material.
10. The LCD according to claim 1 , wherein the passivation layer and the spacer are formed of a photosensitive material.
11. The LCD according to claim 10 , wherein the photosensitive material is a negative photoresist.
12. The LCD according to claim 10 , wherein the photosensitive material is a positive photoresist.
13. A method of manufacturing a liquid crystal display device (LCD), the method comprising:
forming a gate insulating layer on a first substrate;
forming a plurality of TFTs in each pixel region on a first substrate where a plurality of the pixel regions arranged in a matrix are defined;
forming a pixel electrode connected to each TFT;
simultaneously forming a spacer and a passivation layer on the TFT;
preparing a second substrate facing the first substrate and including a color filter layer and a common electrode; and
interposing a liquid crystal layer between the first substrate and the second substrate,
wherein the passivation layer is not formed in the pixel region; and
wherein the pixel electrode is formed to contact the gate insulating layer in the pixel region.
14. The method according to claim 13 , wherein the simultaneous forming of the space and the passivation layer includes:
coating a photosensitive material on the first substrate;
aligning a mask including a full open region, a half open region, and a closed region on the coated photosensitive material; and
irradiating light on the mask.
15. The method according to claim 14 , wherein the half open region diffracts and transmits the light.
16. The method according to claim 14 , wherein the photosensitive material is a negative photoresist.
17. The method according to claim 14 , wherein the photosensitive material is a positive photoresist.
18. The method according to claim 14 , wherein, when the photosensitive material is a negative photoresist, the photosensitive material facing the full open region is hardened to form the spacer, the photosensitive material facing the half open region is half hardened to form the passivation layer, and the photosensitive material facing the closed region is removed.
19. The method according to claim 14 , wherein, when the photosensitive material is a positive photoresist, the photosensitive material facing the closed region is hardened to form the spacer, the photosensitive material facing the half open region is half hardened to form the passivation layer, and the photosensitive material facing the full open region is removed.
20. The method according to claim 13 , further comprising forming a pixel electrode on the first substrate including the passivation region.
21. The method according to claim 20 , wherein a transparent conductive pattern is formed on the spacer and is electrically connected to the common electrode of the second substrate.
22. The method according to claim 20 , wherein a transparent conductive pattern is formed in a peripheral region of the first substrate.