US4308482A
Expired / Lapsed
US
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Piezoelectric device utilizing an electroconductive pliable sheet under pressure
Assignee: Murata Manufacturing Co Ltd
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Filing: 1979-05-23
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Granted: 1981-12-29
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Expires: 1999-05-23
Abstract
Abstract A piezoelectric filter comprises at least one piezoelectric resonator comprising a piezoelectric substrate and first and second electroconductive terminal members deposed one on each side of the piezoelectric substrate, with which they are in electrical contact. At least one electroconductive pliable sheet is disposed between the first terminal member and the associated face of the piezoelectric substrate, and pressure is applied across the thickness of the combination of electrodes, pliable sheet and substrate.
Inventors
- 👤 Ititoshi Kadohashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:19
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/15; H03H9/17; H03H9/02; H03H9/05; H03H9/09; H03H9/46; H03H9/54; H03H9/58; H03H9/60; H03H9/605
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
125 words
A piezoelectric filter including at least one piezoelectric resonator which comprises: a piezoelectric substrate having first and second opposing major faces; first and second electrode layers disposed on said first and second faces, respectively; first and second electroconductive terminal members in electrical contact with said first and second faces of said piezoelectric substrate, respectively; an electroconductive sheet disposed between and in mechanical and electrical contact with both said first terminal member and said first electrode layer; and means for applying pressure to said terminal members in a direction perpendicular to said first and second faces of said piezoelectric substrate, said pressure applying means applying pressure to said terminal members at a predetermined pressure level which will cause said filter to exhibit a desired G.D.T. characteristic.
Claim 2
Dependent Claim
125 words
A piezoelectric filter including at least one piezoelectric resonator which comprises: a piezoelectric substrate having first and second opposing major faces; first and second electrode layers disposed on said first and second faces, respectively; first and second electroconductive terminal members in electrical contact with said first and second faces of said piezoelectric substrate, respectively; an electroconductive sheet disposed between and in mechanical and electrical contact with both said first terminal member and said first electrode layer; and means for applying pressure to said terminal members in a direction perpendicular to said first and second faces of said piezoelectric substrate, said pressure applying means applying pressure to said terminal members at a predetermined pressure level which will cause said filter to exhibit a desired G.D.T. characteristic.
Claim 3
Dependent Claim
18 words
A piezoelectric filter as claimed in claim 1, wherein said electroconductive pliable sheet is a total-conductive plastic sheet.
Claim 4
Dependent Claim
19 words
A piezoelectric filter as claimed in claim 1, wherein said electroconductive pliable sheet is an anisotropically electroconductive plastic sheet.
Claim 5
Dependent Claim
18 words
A piezoelectric filter as claimed in claim 1, wherein said electroconductive pliable sheet is a pressure-conductive plastic sheet.
References Cited (Backward Citations)
US1886814A
Cited
US3109153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |