US4187530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structure for solid state switch
Assignee: AT&T Inc
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Filing: 1978-06-01
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Granted: 1980-02-05
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Expires: 1998-06-01
Abstract
Abstract Certain structures are described for solid state electrical switches which employ electrochromic material. These structures involve use of a common base contact for both switching and readout circuits. The structures are particularly easy to fabricate using integrated circuit techniques and exhibit reduced electrical shorts due to reduced migration of metallic ions.
Inventors
- 👤 Shobha Singh
- 👤 LeGrand G. Van Uitert
- 👤 George J. Zydzik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:41
CPC Classifications
H; H10; H10N; H10N70/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
103 words
A solid state electrical switch comprising an input circuit and a readout circuit in which the read out circuit is switched from insulating to conducting state under the influence of an electric field set up by the input circuit by injecting suitable positive ions into an electrochromic material and switching from conducting to insulating state by removing the positive ions from the electrochromic material by reversing the electric field CHARACTERIZED IN THAT (a) both the readout circuit and the input circuit have a common contact called a based contact and the readout contact and the base contact are mounted on the same plane.
Claim 2
Dependent Claim
103 words
A solid state electrical switch comprising an input circuit and a readout circuit in which the read out circuit is switched from insulating to conducting state under the influence of an electric field set up by the input circuit by injecting suitable positive ions into an electrochromic material and switching from conducting to insulating state by removing the positive ions from the electrochromic material by reversing the electric field CHARACTERIZED IN THAT (a) both the readout circuit and the input circuit have a common contact called a based contact and the readout contact and the base contact are mounted on the same plane.
Claim 3
Dependent Claim
23 words
The solid state electrical switch of claim 1 with which the readout contact and base contact are mounted on the same insulating substrate.
Claim 4
Dependent Claim
29 words
The solid state electrical switch of claim 1 in which the electrochromic material consists essentially of a substance selected from the group consisting of tungsten trioxide and molybdenum trioxide.
Claim 5
Dependent Claim
33 words
The solid state electrical switch of claim 1 in which the injection ion is selected from the group consisting of H + , Li + , Na + , and K + .
Claim 6
Dependent Claim
17 words
The solid state electrical switch of claim 1 in which the injection ion is H + .
Claim 7
Dependent Claim
17 words
The solid state electrical switch of claim 1 in which the injection ion is Li + .
Claim 8
Dependent Claim
17 words
The solid state electrical switch of claim 1 in which the electrolyte is an aqueous acid solution.
Claim 9
Dependent Claim
17 words
The solid state electrical switch of claim 7 in which the aqueous acid solution is sulfuric acid.
Claim 10
Dependent Claim
31 words
The solid state electrical switch of claim 1 in which the electrolyte is selected from the group consisting of silicon dioxide lithium fluoride, magnesium difluoride, lanthanum difluoride and rare earth trifluorides.
Claim 11
Dependent Claim
20 words
The solid state electrical switch of claim 1 in which the base contact and readout contact have an interlaced configuration.
Claim 12
Dependent Claim
20 words
The solid state electrical switch of claim 10 in which the base contact and readout contact have a zig-zag configuration.
Claim 13
Dependent Claim
20 words
The solid state electrical switch of claim 10 in which the base contact and readout contact have an interlacing configuration.
Claim 14
Dependent Claim
20 words
The solid state electrical switch of claim 10 in which the base contact and readout contact have a spiral configuration.
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) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |