US3571670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
tching device including boron and silicon, carbon or the like
Assignee: Energy Conversion Devices Inc
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Filing: 1968-04-11
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Granted: 1971-03-23
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Expires: 1988-04-11
Abstract
Abstract A current switching device for an electrical circuit including a semiconductor material and electrodes in contact therewith, wherein the semiconductor material has a high electrical resistance, wherein the high electrical resistance is substantially instantaneously decreased to a low electrical resistance in response to a voltage above a threshold voltage value, wherein the low electrical resistance is immediately returned to the high electrical resistance in response to a decrease in current below a minimum current-holding value, and wherein the semiconductor material consists essentially of boron and carbon, silicon, titanium, germanium zirconium or hafnium.
Inventors
- 👤 Stanford R Ovshinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:43
CPC Classifications
H; H10; H10N; H10N70/00; H10N70/20; H10N70/011; H10N70/021; H10N70/026; H10N70/801; H10N70/821; H10N70/826; H10N70/881; H10N70/884
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
18 words
A switching device as defined in claim 1, wherein said semiconductor material consists essentially of boron and silicon.
Claim 2
Dependent Claim
18 words
A switching device as defined in claim 1, wherein said semiconductor material consists essentially of boron and carbon.
Claim 3
Dependent Claim
19 words
A switching device as defined in claim 1, wherein said semiconductor material consists essentially of boron, silicon and carbon.
Claim 4
Dependent Claim
15 words
A switching device as defined in claim 1, wherein said semiconductor material is substantially amorphous.
Claim 5
Dependent Claim
71 words
A switching device as defined in claim 1, wherein the high electrical resistance-blocking condition is decreased to the low electrical resistance-conducting condition during each half-cycle responsive to the instantaneous voltage of an AC voltage above said threshold voltage value, and wherein the low electrical resistance-conducting condition is returned to the high electrical resistance-blocking condition during each half-cycle responsive to the instantaneous current of an AC current below said minimum current-holding value.
References Cited (Backward Citations)
US3271591A
Cited
US3421054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |