US4282272A
Expired / Lapsed
US
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Method for forming electrochromic film
Assignee: AGC Inc
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Filing: 1979-06-05
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Granted: 1981-08-04
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Expires: 1999-06-05
Abstract
Abstract An amorphous electrochromic film prepared by vacuum evaporation under relatively high pressure of 2×10 -4 -2×10 -3 torr. The evaporated film is porous with packing density less than 0.65 and exhibits excellent reversibility after heat treatment at 250° C.-350° C. whereby it is optimum for an electrochromic device sealed with a sealant of tetrafluoroethylene-ethylene copolymer having no reactivity with electrolyte, low moisture permeability, excellent chemical properties and good adhesiveness.
Inventors
- 👤 Kenzi Matsuhiro
- 👤 Yasushi Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:23
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/153; G02F1/161; C; C23; C23C; C23C14/00; C23C14/06; C23C14/08; C23C14/083; G02F1/1514; G02F1/1523; G02F1/1524
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
53 words
A process for forming an amorphous electrochromic film upon a substrate having an electrode which comprises carrying out a vacuum evaporation and deposition of electrochromic material under a pressure of 2×10 -4 to 2×10 -3 torr upon said substrate having an electrode to provide an electrochromic film, and then, carrying out a heat-treatment.
Claim 2
Dependent Claim
53 words
A process for forming an amorphous electrochromic film upon a substrate having an electrode which comprises carrying out a vacuum evaporation and deposition of electrochromic material under a pressure of 2×10 -4 to 2×10 -3 torr upon said substrate having an electrode to provide an electrochromic film, and then, carrying out a heat-treatment.
Claim 3
Dependent Claim
15 words
A process according to claim 1 wherein the electrochromic film is made of tungsten oxide.
Claim 4
Dependent Claim
43 words
A process according to claim 1 wherein the electrochromic film is made of tungsten oxide incorporating at least one selected from the group consisting of TiO 2 , Ta 2 O 5 , Nb 2 O 5 and V 2 O 5 .
Claim 5
Dependent Claim
24 words
A process according to claim 1 wherein the electrochromic film is made of tungsten oxide incorporating about 20 wt.% B 2 O 3 .
Claim 6
Dependent Claim
30 words
A process according to claim 1, 2, 3 or 4 wherein the electrochromic film is formed in a vacuum evaporation chamber having a pressure of 5×10 -4 -2×10 -3 torr.
Claim 7
Dependent Claim
23 words
A process according to claim 1, 2, 3 or 4, wherein a temperature in the heat-treatment is ranging from 250° to 350° C.
Claim 8
Dependent Claim
19 words
A process according to claim 5, wherein a temperature in the heat-treatment is ranging from 250° to 350° C.
References Cited (Backward Citations)
US3978007A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |