US3728694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin film ferroelectric device
Assignee: Technovation Inc
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Filing: 1970-09-28
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Granted: 1973-04-17
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Expires: 1990-09-28
Abstract
Abstract A ferroelectric device having a layer of stable ferroelectric potassium nitrate disposed between electrical contacts positioned on opposite surfaces of the ferroelectric layer. The ferroelectric layer has a thickness of less than 110 microns, and preferably falling within a range of from 100 angstrom units to 1000 angstrom units. The process of manufacturing the ferroelectric device includes the cooling of a layer of potassium nitrate by exposing the layer to a cold dry gas without quenching to form a stable ferroelectric layer.
Inventors
- 👤 G Rohrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:10
CPC Classifications
H; H01; H01G; H01G7/00; H01G7/02; H01G7/025
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
33 words
A ferroelectric device comprising, in combination: a ferroelectric potassium nitrate layer having a thickness of less than 110 microns; and electrical contacts disposed on predetermined surface areas of said ferroelectric potassium nitrate layer.
Claim 2
Dependent Claim
33 words
A ferroelectric device comprising, in combination: a ferroelectric potassium nitrate layer having a thickness of less than 110 microns; and electrical contacts disposed on predetermined surface areas of said ferroelectric potassium nitrate layer.
Claim 3
Dependent Claim
31 words
A ferroelectric device characterized in accordance with claim 1, wherein said thickness Of said ferroelectric potassium nitrate layer falls within a range of from 100 angstrom units to 1,000 angstrom units.
Claim 4
Dependent Claim
30 words
A ferroelectric device characterized in accordance with claim 1, wherein at least one of said electrical contacts comprises an electrode formed from a metallic substance containing at least some aluminum.
Claim 5
Dependent Claim
37 words
A ferroelectric device characterized in accordance with claim 1, wherein said ferroelectric potassium nitrate layer has a thickness of less than 1 micron and comprises Phase III potassium nitrate which is stable at standard temperature and pressure.
Claim 6
Dependent Claim
43 words
A ferroelectric device characterized in accordance with claim 1, wherein one of said electrical contacts is comprised of material which includes at least some silver, and wherein another of said electrical contacts is comprised of a material which includes at least some aluminum.
References Cited (Backward Citations)
US3142044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |