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US3761746A
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Poling of ferro-electric substrates
Assignee: Zenith Electronics LLC
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Filing: 1971-11-08
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Granted: 1973-09-25
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Expires: 1991-11-08
Abstract
Abstract Ferro-electric bodies are poled by employing an ionized gas or other medium as a poling electrode.
Inventors
- 👤 R Adler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:24
CPC Classifications
H; H01; H01G; H01G7/00; H01G7/02; H01G7/025; H01G7/026; H10; H10N; H10N30/00; H10N30/01; H10N30/04; H10N30/045; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
42 words
The method of poling a ferro-electric ceramic body comprising the steps of: exposing the opposed major surfaces of said body respectively to two electrically and mechanically isolated regions of ionization; and establishing an electric unidirectional potential difference between said regions of ionization.
Claim 2
Independent Claim
42 words
The method of poling a ferro-electric ceramic body comprising the steps of: exposing the opposed major surfaces of said body respectively to two electrically and mechanically isolated regions of ionization; and establishing an electric unidirectional potential difference between said regions of ionization.
Claim 3
Independent Claim
79 words
The method of poling a piezoelectric ceramic body comprising the steps of: sealing the body in a closed container of electrical insulating material to divide the interior of said container into two sub-chambers hermetically sealed and electrically isolated from each other; reducing the pressure in each of said sub-chambers to a pressure substantially below atmospheric pressure; independently ionizing the residual gas in each of said sub-chambers; and establishing a DC potential difference between the ionized gas in said sub-chambers.
Claim 4
Independent Claim
79 words
The method of poling a piezoelectric ceramic body comprising the steps of: sealing the body in a closed container of electrical insulating material to divide the interior of said container into two sub-chambers hermetically sealed and electrically isolated from each other; reducing the pressure in each of said sub-chambers to a pressure substantially below atmospheric pressure; independently ionizing the residual gas in each of said sub-chambers; and establishing a DC potential difference between the ionized gas in said sub-chambers.
Claim 5
Dependent Claim
31 words
The method as defined in claim 2 wherein said ionizing step includes establishing an electric field in each of said sub-chambers of a strength sufficient to establish a glow discharge therein.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |