IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0849838
(2013-03-25)
|
등록번호 |
US-8558983
(2013-10-15)
|
우선권정보 |
JP-2000-075467 (2000-03-17) |
발명자
/ 주소 |
- Yamazaki, Shunpei
- Hirakata, Yoshiharu
|
출원인 / 주소 |
- Semiconductor Energy Laboratory Co., Ltd.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
253 |
초록
▼
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. B
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.
대표청구항
▼
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 sub
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; anda 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. 2. The liquid crystal display device according to claim 1, further comprising an orientation film between the pixel electrode and the liquid crystal material. 3. The liquid crystal display device according to claim 1, wherein each of the plurality of the spacers is a wall-like spacer. 4. The liquid crystal display device according to claim 1, wherein the plurality of the spacers are located in the pixel portion. 5. The liquid crystal display device according to claim 1, wherein each of the plurality of the spacers comprises a photosensitive material. 6. A liquid crystal display device comprising: 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; anda 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. 7. The liquid crystal display device according to claim 6, further comprising an orientation film between the pixel electrode and the liquid crystal material. 8. The liquid crystal display device according to claim 6, wherein each of the plurality of the spacers is a wall-like spacer. 9. The liquid crystal display device according to claim 6, wherein the plurality of the spacers are located in the pixel portion. 10. The liquid crystal display device according to claim 6, wherein each of the plurality of the spacers comprises a photosensitive material. 11. A liquid crystal display device comprising: 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; anda 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. 12. The liquid crystal display device according to claim 11, further comprising an orientation film between the pixel portion and the liquid crystal material. 13. The liquid crystal display device according to claim 11, wherein each of the plurality of the spacers is a wall-like spacer. 14. The liquid crystal display device according to claim 11, wherein the plurality of the spacers are located in the pixel portion. 15. The liquid crystal display device according to claim 11, wherein each of the plurality of the spacers comprises a photosensitive material.
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