Patent US4924243A successfully refreshed from Google Patents.
US4924243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing liquid crystal device with spacers formed by printing
Assignee: Semiconductor Energy Laboratory Co Ltd
•
Filing: 1988-05-23
•
Granted: 1990-05-08
•
Expires: 2008-05-23
Abstract
Abstract An improved liquid crystal device and manufacturing method for same are described. In the device, a pair of substrates, between which a liquid crystal layer is disposed, is joined with pillars inbetween functioning as spacers which are provided of a resin by printing. With this structure, the spacers can be in surface contact with the inside surfaces of the substrates on which electrode arrangement and active devices are formed.
Inventors
- 👤 Masahiko Sato
- 👤 Akira Mase
- 👤 Hiroyuki Sakayori
- 👤 Shunpei Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:43
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; G02F1/13394; G02F1/13392; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
185 words
A method of manufacturing a liquid crystal device comprising the steps of: forming an electrode arrangement on the inside surfaces of a pair of substrates; printing a prescribed pattern of pillars and a sealing member on the inside surface of one of said substrates; joining and uniting said pair of substrates; and disposing a liquid crystal material between said pair of substrates; wherein said printing step is implemented by a printing press including a container holding said material, a cylinder capable of rotating and receiving said material on a surface thereof which cylinder is formed with indentations corresponding to said patterns, a squeegee for pushing off said material other than that trapped in the pattern and a printing roll engaged with said cylinder which receives said material in the form of said prescirbed pattern; with said printing roll being adapted to engage said one substrate in order to transfer said pattern from said surface to a surface of the substrate such that the thickness of the pillars and the sealing members can be controlled in accordance with the depth of the indentations in the cylinder.
Claim 2
Independent Claim
185 words
A method of manufacturing a liquid crystal device comprising the steps of: forming an electrode arrangement on the inside surfaces of a pair of substrates; printing a prescribed pattern of pillars and a sealing member on the inside surface of one of said substrates; joining and uniting said pair of substrates; and disposing a liquid crystal material between said pair of substrates; wherein said printing step is implemented by a printing press including a container holding said material, a cylinder capable of rotating and receiving said material on a surface thereof which cylinder is formed with indentations corresponding to said patterns, a squeegee for pushing off said material other than that trapped in the pattern and a printing roll engaged with said cylinder which receives said material in the form of said prescirbed pattern; with said printing roll being adapted to engage said one substrate in order to transfer said pattern from said surface to a surface of the substrate such that the thickness of the pillars and the sealing members can be controlled in accordance with the depth of the indentations in the cylinder.
Claim 3
Dependent Claim
13 words
A method as in claim 1 where said liquid crystal material is ferroelectric.
Claim 4
Dependent Claim
41 words
A method of claim 1 wherein said printing press machine further comprising an accompanying roll which is located adjacent to said printing roll with a suitable interval and rotates with said printing roll so that a substrate can be transported therebetween.
Claim 5
Dependent Claim
11 words
A method of claim 1 wherein said material is a resin.
Claim 6
Dependent Claim
12 words
A method of claim 4 wherein said resin is an epoxy adhesive.
Claim 7
Dependent Claim
18 words
A method of claim 1 wherein the distance between said pair of substrates is less than 3 microns.
Claim 8
Dependent Claim
14 words
A method of claim 6 wherein said liquid crystal is a ferroelectric liquid crystal.
Claim 9
Dependent Claim
11 words
A method of claim 6 wherein said distance is 2.2±0.5 microns.
Claim 10
Dependent Claim
16 words
A method of claim 1 further comprising a step of prebaking said substrates which are united.
References Cited (Backward Citations)
US3684614A
Cited
US3742600A
Cited
US4187340A
Cited
US4224093A
Cited
US4367924A
Cited
US4613395A
Cited
US4744639A
Cited
JPS61173222A
Cited
US4643532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |