US4503350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric resonator device with a laminated structure
Assignee: Murata Manufacturing Co Ltd
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Filing: 1984-01-04
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Granted: 1985-03-05
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Expires: 2004-01-04
Abstract
Abstract A piezoelectric resonator device with a laminated structure include two piezoelectric plates, each having opposite flat surfaces and polarized in a predetermined direction. Each piezoelectric plate is deposited with electrodes on its opposite flat surfaces, respectively. A junction layer of solder is rigidly held between the two piezoelectric plates for holding them together in a laminated structure. A weight ratio of the junction layer to a sum of two piezoelectric plates including their electrodes is selected to be between 0.5% and 5%.
Inventors
- 👤 Hiroshi Nakatani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:10
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/54; H03H9/58; H03H9/581
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
127 words
A piezoelectric resonator device with a laminated structure comprising: at least first and second piezoelectric plates, each having opposite flat surfaces and polarized in a predetermined direction; first and second electrode means deposited on said opposite flat surfaces, respectively, of said first piezoelectric plate; third and fourth electrode means deposited on said opposite flat surfaces, respectively, of said second piezoelectric plate; a junction layer rigidly held between second and third electrodes for assembling said first and second piezoelectric plates together in a laminated structure; and connecting means for electrically connecting said second and third electrodes, a weight ratio of said junction layer to a sum of first and second piezoelectric plates and first, second, third and fourth electrode means being selected to be between 0.5% and 5%.
Claim 2
Dependent Claim
127 words
A piezoelectric resonator device with a laminated structure comprising: at least first and second piezoelectric plates, each having opposite flat surfaces and polarized in a predetermined direction; first and second electrode means deposited on said opposite flat surfaces, respectively, of said first piezoelectric plate; third and fourth electrode means deposited on said opposite flat surfaces, respectively, of said second piezoelectric plate; a junction layer rigidly held between second and third electrodes for assembling said first and second piezoelectric plates together in a laminated structure; and connecting means for electrically connecting said second and third electrodes, a weight ratio of said junction layer to a sum of first and second piezoelectric plates and first, second, third and fourth electrode means being selected to be between 0.5% and 5%.
Claim 3
Dependent Claim
20 words
A piezoelectric resonator device as claimed in claim 1, wherein said first and second piezoelectric plates have a square configuration.
Claim 4
Dependent Claim
29 words
A piezoelectric resonator device as claimed in claim 2, wherein said first electrode means comprises a peripheral electrode and a center electrodes which are electrically separated from each other.
Claim 5
Dependent Claim
20 words
A piezoelectric resonator device as claimed in claim 1, wherein said first and second piezoelectric plates have a rectangular configuration.
Claim 6
Dependent Claim
29 words
A piezoelectric resonator device as claimed in claim 4, wherein said first electrode means comprises a peripheral electrode and a center electrodes which are electrically separated from each other.
Claim 7
Dependent Claim
20 words
A piezoelectric resonator device as claimed in claim 1, wherein said first and second piezoelectric plates have a circle configuration.
Claim 8
Dependent Claim
29 words
A piezoelectric resonator device as claimed in claim 6, wherein said first electrode means comprises a peripheral electrode and a center electrodes which are electrically separated from each other.
Claim 9
Dependent Claim
39 words
A piezoelectric resonator device as claimed in claim 4, wherein said first electrode means comprises two parallel electrodes aligned side by side and electrically separated from each other by a groove which partly intrudes into said first piezoelectric plate.
Claim 10
Dependent Claim
17 words
A piezoelectric resonator device as claimed in claim 1, wherein said junction layer is formed by solder.
Claim 11
Dependent Claim
26 words
A piezoelectric resonator device as claimed in claim 1, wherein said junction layer is formed by an electric non-conductive adhesive material chosen from epoxy resin group.
Claim 12
Dependent Claim
21 words
A piezoelectric resonator device as claimed in claim 1, wherein said junction layer is formed by an electric conductive adhesive material.
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) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |