Patent US4464599A successfully refreshed from Google Patents.
US4464599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric resonator with integrated capacitances
Assignee: Alcatel Lucent NV
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Filing: 1981-09-28
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Granted: 1984-08-07
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Expires: 2001-09-28
Abstract
Abstract If a piezoelectric crystal is used in circuits containing ICs with low supply voltage, the additional capacitors required in oscillator or filter circuits cannot be implemented as junction capacitances. To eliminate the need for additional discrete capacitors, these capacitances are implemented with additional films on the crystal.
Inventors
- 👤 Wolfgang Briese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:23
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/0504; H03H9/0514; G; G04; G04F; G04F5/00; G04F5/04; G04F5/06; G04F5/063; H03B; H03B5/00; H03B5/30; H03B5/32; H03H9/0538; H03H9/0542
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
69 words
A piezoelectric resonator arrangement comprising: a substrate having an opening; a resonator crystal; at least two electrode films positioned on said crystal; means for holding said crystal on said substrate and over said opening at the vibration nodes of said crystal; at least two capacitance films deposited on said crystal to provide circuit capacitance; and conductive means for providing electrical connection to said capacitance films via said holding means.
Claim 2
Dependent Claim
69 words
A piezoelectric resonator arrangement comprising: a substrate having an opening; a resonator crystal; at least two electrode films positioned on said crystal; means for holding said crystal on said substrate and over said opening at the vibration nodes of said crystal; at least two capacitance films deposited on said crystal to provide circuit capacitance; and conductive means for providing electrical connection to said capacitance films via said holding means.
Claim 3
Dependent Claim
62 words
The piezoelectric resonator arrangement as claimed in claim 1 wherein one of each of said electrode films and capacitance films is positioned on one of the sides and the other of said electrode and capacitance films is positioned on the opposite side of the crystal such that each capacitance film is superimposed on the associated electrode film to form said circuit capacitance.
Claim 4
Dependent Claim
50 words
The piezoelectric resonator arrangement as claimed in claim 1 wherein one of said capacitance films is located on one side and the other capacitance film is located on the opposite side of said crystal and wherein said crystal constitutes a dielectric, said films and said crystal forming said circuit capacitance.
Claim 5
Dependent Claim
30 words
The piezoelectric resonator arrangement as claimed in claim 2, further comprising an insulating layer positioned between each of said capacitance films and said electrode films to form said circuit capacitance.
Claim 6
Dependent Claim
23 words
The piezoelectric resonator arrangement as claimed in claim 1 wherein the area of said capacitance films is varied to adjust said circuit capacitance.
Claim 7
Dependent Claim
28 words
The piezoelectric resonator arrangement is claimed in claim 1 wherein said opening is rectangular and has chamfered corners and said holding means is positioned on said chamfered corners.
Claim 8
Dependent Claim
18 words
The piezoelectric resonator arrangement as claimed in claim 1 wherein said holding means is a plurality of blocks.
Claim 9
Dependent Claim
27 words
The piezoelectric resonator arrangement as claimed in claim 1 wherein said opening is circular and said holding means is positioned on the rim of said circular opening.
Claim 10
Dependent Claim
17 words
The piezoelectric resonator arrangement as claimed in claim 1 wherein said holding means is a conductive adhesive.
Claim 11
Dependent Claim
72 words
An oscillator arrangement comprising: a piezoelectric resonator arrangement including a substrate an opening a resonator crystal, at least two electrode films positioned on said crystal, means for holding said crystal on said substrate and over said opening at the vibration nodes of said crystal, at least two capacitance films deposited on said crystal to provide load capacitance, and conductive means for providing electrical connection to said capacitance films via said holding means.
Claim 12
Dependent Claim
72 words
An oscillator arrangement comprising: a piezoelectric resonator arrangement including a substrate an opening a resonator crystal, at least two electrode films positioned on said crystal, means for holding said crystal on said substrate and over said opening at the vibration nodes of said crystal, at least two capacitance films deposited on said crystal to provide load capacitance, and conductive means for providing electrical connection to said capacitance films via said holding means.
Claim 13
Dependent Claim
73 words
A filter circuit arrangement comprising: a piezoelectric resonator arrangement including a substrate an opening, a resonator crystal, a least two electrode films positioned on said crystal, means for holding said crystal on said substrate and over said opening at the vibration nodes of said crystal, at least two capacitance films deposited on said crystal to provide circuit capacitance, and conductive means for providing electrical connection to said capacitance films via said holding means.
Claim 14
Dependent Claim
73 words
A filter circuit arrangement comprising: a piezoelectric resonator arrangement including a substrate an opening, a resonator crystal, a least two electrode films positioned on said crystal, means for holding said crystal on said substrate and over said opening at the vibration nodes of said crystal, at least two capacitance films deposited on said crystal to provide circuit capacitance, and conductive means for providing electrical connection to said capacitance films via said holding means.
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) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |