US6064456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing reflection-type liquid crystal display apparatus
Assignee: Sharp Corp
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Filing: 1998-06-16
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Granted: 2000-05-16
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Expires: 2018-06-16
Abstract
Abstract The present invention provides a process for manufacturing a reflection-type liquid crystal display apparatus. The method includes the steps of: forming scanning lines, signal lines, a thin film transistor and a connector electrode on a substrate; forming a photosensitive resin film covering at least the connector electrode, and forming a reflection electrode film on the photosensitive resin film and other portions; removing a portion of the reflection electrode film located at least on the connector electrode, and patterning the reflection electrode film so that the pixel electrode resides in the display region; and removing a portion of the photosensitive resin film located on the connector electrode to reveal the connector electrode.
Inventors
- 👤 Koji Taniguchi
- 👤 Toru Matano
- 👤 Yasunori Shimada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:24
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/136227
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
219 words
A process for manufacturing a reflection-type liquid crystal display apparatus, said reflection-type liquid crystal display apparatus comprising a pair of oppositely arranged substrates a liquid crystal layer interposed therebetween, and on one of said substrates, a plurality of pixel electrodes with a reflective function formed in a matrix shape, a plurality of scanning lines and a plurality of signal lines crossing each other while passing through the vicinity of said pixel electrode, a thin film transistor provided in the vicinity of the crossing portion between each scanning line and each signal line and connected to said pixel electrode, and a connector electrode on the terminal portion of each scanning line and each signal line located outside of the display region, said process comprising the steps of: forming said scanning lines, said signal lines, said thin film transistor and said connector electrode on said substrate; forming a photosensitive resin film covering at least said connector electrode, and forming a reflection electrode film on said photosensitive resin film and other portions; removing a portion of said reflection electrode film located at least on said connector electrode, and patterning said reflection electrode film so that said pixel electrode resides in said display region; and removing a portion of said photosensitive resin film located on said connector electrode to reveal said connector electrode.
Claim 2
Dependent Claim
219 words
A process for manufacturing a reflection-type liquid crystal display apparatus, said reflection-type liquid crystal display apparatus comprising a pair of oppositely arranged substrates a liquid crystal layer interposed therebetween, and on one of said substrates, a plurality of pixel electrodes with a reflective function formed in a matrix shape, a plurality of scanning lines and a plurality of signal lines crossing each other while passing through the vicinity of said pixel electrode, a thin film transistor provided in the vicinity of the crossing portion between each scanning line and each signal line and connected to said pixel electrode, and a connector electrode on the terminal portion of each scanning line and each signal line located outside of the display region, said process comprising the steps of: forming said scanning lines, said signal lines, said thin film transistor and said connector electrode on said substrate; forming a photosensitive resin film covering at least said connector electrode, and forming a reflection electrode film on said photosensitive resin film and other portions; removing a portion of said reflection electrode film located at least on said connector electrode, and patterning said reflection electrode film so that said pixel electrode resides in said display region; and removing a portion of said photosensitive resin film located on said connector electrode to reveal said connector electrode.
Claim 3
Dependent Claim
62 words
The process for manufacturing a reflection-type liquid crystal display apparatus of claim 1, comprising forming said photosensitive resin film covering said connector electrode and being located at least under said pixel electrode, forming a contact hole in said photosensitive resin film, and forming said pixel electrode as electrically connecting to the drain electrode of said thin film transistor through said contact hole.
Claim 4
Dependent Claim
59 words
The process for manufacturing a reflection-type liquid crystal display apparatus of claim 1, comprising forming said photosensitive resin film in a portion where said pixel electrode is formed, forming a plurality of convex portions and a plurality of concave portions from said photosensitive resin film, and forming said pixel electrode as covering said convex portions and said concave portions.
Claim 5
Dependent Claim
29 words
The process for manufacturing a reflection-type liquid crystal display apparatus of claim 1, wherein said connector electrode is made from ITO, and said pixel electrode is made from Al.
Claim 6
Dependent Claim
41 words
The process for manufacturing a reflection-type liquid crystal display apparatus of claim 1, wherein the step of revealing said connector electrode is carried out by an ashing in an O 2 plasma or an O 2 plasma containing CF 4 .
Claim 7
Dependent Claim
80 words
The process for manufacturing a reflection-type liquid crystal display apparatus of claim 1, wherein the steps of patterning said reflection electrode film and revealing said connector electrode comprise: patterning said reflection electrode film in a state that said pixel electrode is continuous in said display region; removing a portion of said photosensitive resin film located on said connector electrode by ashing to reveal said connector electrode; and patterning said reflection electrode film so as to separate said continuous pixel electrode.
Claim 8
Dependent Claim
103 words
The process for manufacturing a reflection-type liquid crystal display apparatus of claim 1, wherein the steps of patterning said reflection electrode film and revealing said connector electrode comprise: patterning said reflection electrode film in a state that said pixel electrode is continuous in said display region and extended over the outside of said display region; removing a portion of said photosensitive resin film located on said connector electrode by ashing to reveal said connector electrode; and patterning said reflection electrode film so as to separate said continuous pixel electrode and remove a portion of said pixel electrode located outside of said display region.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-05-16 | 2003-11-15 | 2004-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-05-16 | 2007-11-15 | 2008-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-05-16 | 2011-11-15 | 2012-05-16 | $7700.00 | Window Closed / Lapsed |