Invention Grant
- Patent Title: Liquid crystal display device and manufacturing method thereof
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Application No.: US12758424Application Date: 2010-04-12
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Publication No.: US08421985B2Publication Date: 2013-04-16
- Inventor: Shunpei Yamazaki , Yoshiharu Hirakata
- Applicant: Shunpei Yamazaki , Yoshiharu Hirakata
- Applicant Address: JP Atsugi-shi, Kanagawa-ken
- Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
- Current Assignee Address: JP Atsugi-shi, Kanagawa-ken
- Agency: Robinson Intellectual Property Law Office, P.C.
- Agent Eric J. Robinson
- Priority: JP2000-075467 20000317
- Main IPC: G02F1/1339
- IPC: G02F1/1339

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.
Public/Granted literature
- US20100195013A1 LIQUID CRYSTAL DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF Public/Granted day:2010-08-05
Information query
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