US4608510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric micro-resonateur
Assignee: Asulab AG
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Filing: 1982-01-13
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Granted: 1986-08-26
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Expires: 2002-01-13
Abstract
Abstract The micro-resonator comprises, cut from the same quartz crystal, a bar and a suspension frame means. The bar is cut in a substantially Z cut mode. The excitation electrodes are disposed on the sides of the bar. The length of the bar is substantially parallel to the Y axis. This produces a resonator which vibrates in a main mode of extension-compression, at from 0.5 MHz to 4 MHz.
Inventors
- 👤 Rudolf J. Dinger
- 👤 Jean-Georges Michel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:21
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/0595
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
121 words
A micro-resonator for vibrating in a main extension-compression mode, comprising a Z cut bar; and an integrated suspension assembly for said Z cut bar formed integral with said bar, said bar and suspension assembly being chemically cut from the same plate of piezoelectric material, said bar having a length, a width and a thickness respectively disposed substantially parallel to the Y, X and Z axes of said piezoelectric material, the width of the bar being smaller than the thickness of the bar; an electrode disposed on each side of said bar which extends parallel to the bar length and thickness, for exciting the vibration of the bar; and conducting connections provided on said suspension assembly and electrically connected to the electrodes.
Claim 2
Dependent Claim
121 words
A micro-resonator for vibrating in a main extension-compression mode, comprising a Z cut bar; and an integrated suspension assembly for said Z cut bar formed integral with said bar, said bar and suspension assembly being chemically cut from the same plate of piezoelectric material, said bar having a length, a width and a thickness respectively disposed substantially parallel to the Y, X and Z axes of said piezoelectric material, the width of the bar being smaller than the thickness of the bar; an electrode disposed on each side of said bar which extends parallel to the bar length and thickness, for exciting the vibration of the bar; and conducting connections provided on said suspension assembly and electrically connected to the electrodes.
Claim 3
Dependent Claim
33 words
A micro-resonator according to claim 1, wherein said suspension assembly comprises two arms disposed on respective sides of said bar, said arms being connected to the bar substantially at the mid-length position thereof.
Claim 4
Dependent Claim
23 words
A micro-resonator according to claim 2, wherein each side is provided with a single electrode extending substantially over the whole of said side.
Claim 5
Dependent Claim
72 words
A micro-resonator according to claim 2, wherein each side comprises a central electrode disposed on respective sides of the arm and a number 2n of additional electrodes, n being an odd integer, an electrode on one side facing an electrode on another side to form a pair of electrodes, with two consecutive pairs of electrodes being biased to create electrical fields of the same direction but in different ways in the bar.
Claim 6
Dependent Claim
35 words
A micro-resonator according to anyone of claims 1, wherein the sides of the bar are parallel to an axis Z' forming with the axis Z an angle which is less than 20° in absolute value.
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) | 1989-08-25 | 1990-02-24 | 1990-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-25 | 1994-02-24 | 1994-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-25 | 1998-02-24 | 1998-08-26 | $7700.00 | Window Closed / Lapsed |