Patent US3676724A successfully refreshed from Google Patents.
US3676724A
Expired / Lapsed
US
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Multi-element piezoelectric circuit component
Assignee: Vernitron Corp
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Filing: 1970-06-24
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Granted: 1972-07-11
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Expires: 1990-06-24
Abstract
Abstract There is disclosed a multi-element piezoelectric circuit component comprising a thin wafer of material, at least a part of which is piezoelectric, having two major surfaces whereon a plurality of spaced electrodes and counter electrode means provides in coaction with the intervening material a combination of two or more elements consisting of acoustically isolated coupled mode filters, acoustically isolated resonators and capacitors. Acoustical isolation of the elements can be effected by use of damping or lossy material on the wafer in addition to spacial arrangements of the electrodes. Capacitor elements are formed on a section of the wafer having little or no piezoelectric activity.
Inventors
- 👤 Don A Berlincourt
- 👤 Kendall A Pim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:31
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/54; H03H9/545
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
142 words
A circuit component comprising: a thin wafer of material having two major surfaces and having a piezoelectrically active region and an inactive region; at least three spaced electrodes, each positioned on an active region of one major surface of said wafer, and counter electrode means positioned on the opposite major surface of said wafer in opposition to said electrodes, said electrodes and counter electrode means coacting with the intervening piezoelectric material to form at least three resonator elements with at least two resonator elements being acoustically coupled to form at least one coupled mode filter And at least one resonator element being acoustically isolated from said coupled mode filter; at least one electrode on an inactive region of said wafer and counter electrode means positioned in opposition to said electrode, said electrode and counter electrode means forming at least one capacitor element.
Claim 2
Dependent Claim
142 words
A circuit component comprising: a thin wafer of material having two major surfaces and having a piezoelectrically active region and an inactive region; at least three spaced electrodes, each positioned on an active region of one major surface of said wafer, and counter electrode means positioned on the opposite major surface of said wafer in opposition to said electrodes, said electrodes and counter electrode means coacting with the intervening piezoelectric material to form at least three resonator elements with at least two resonator elements being acoustically coupled to form at least one coupled mode filter And at least one resonator element being acoustically isolated from said coupled mode filter; at least one electrode on an inactive region of said wafer and counter electrode means positioned in opposition to said electrode, said electrode and counter electrode means forming at least one capacitor element.
Claim 3
Dependent Claim
27 words
A circuit component as claimed in claim 1 wherein said wafer is formed from ferroelectric ceramic material and said resonator elements having a thickness mode of vibration.
Claim 4
Dependent Claim
27 words
A circuit component as claimed in claim 1 wherein said wafer is formed from natural piezoelectric crystals and said resonator elements having a thickness mode of vibration.
Claim 5
Dependent Claim
48 words
A circuit component as claimed in claim 1 wherein said wafer is formed from polycrystalline non-ferroelectric material selected from the group consisting of cadmium sulfide, cadmium selenide, zinc oxide, beryllium oxide, wurtzite zinc sulfide, and solid solutions thereof; and said resonator elements having a thickness mode of vibration.
Claim 6
Dependent Claim
16 words
A circuit component as claimed in claim 1 wherein said wafer is formed from ferroelectric crystals.
Claim 7
Dependent Claim
19 words
A circuit component as claimed in claim 2 wherein said inactive region comprises the unpoled area of said wafer.
Claim 8
Dependent Claim
25 words
A circuit component as claimed in claim 3 wherein said wafer is provided with sufficient damping material to form the inactive region of said wafer.
Claim 9
Dependent Claim
25 words
A circuit component as claimed in claim 7 wherein said wafer is provided with sufficient mass loading to form the inactive region of said wafer.
Claim 10
Dependent Claim
17 words
A circuit component as claimed in claim 7 wherein said damping material is formed from epoxy resin.
Claim 11
Dependent Claim
142 words
A circuit component comprising: a thin wafer of material having two major surfaces and having a piezoelectrically active region and an inactive region, at least two groups of electrodes, each group of electrodes consisting of at least two spaced electrodes, each group positioned on an active region of one major surface of said wafer and counter electrode means positioned on the opposite major surface of said wafer in opposition to said electrodes, said electrodes and counter electrode means coacting with the intervening piezoelectric material to form at least two groups of acoustically coupled resonator elements to form at least two coupled mode filters acoustically isolated from each other; at least one electrode positioned on an inactive region of said wafer and counter electrode means positioned in opposition to said electrode, said electrode and counter electrode means forming at least one capacitor element.
Claim 12
Dependent Claim
142 words
A circuit component comprising: a thin wafer of material having two major surfaces and having a piezoelectrically active region and an inactive region, at least two groups of electrodes, each group of electrodes consisting of at least two spaced electrodes, each group positioned on an active region of one major surface of said wafer and counter electrode means positioned on the opposite major surface of said wafer in opposition to said electrodes, said electrodes and counter electrode means coacting with the intervening piezoelectric material to form at least two groups of acoustically coupled resonator elements to form at least two coupled mode filters acoustically isolated from each other; at least one electrode positioned on an inactive region of said wafer and counter electrode means positioned in opposition to said electrode, said electrode and counter electrode means forming at least one capacitor element.
Claim 13
Dependent Claim
27 words
A circuit component as claimed in claim 10 wherein said wafer is formed from ferroelectric ceramic material and said resonator elements having a thickness mode of vibration.
Claim 14
Dependent Claim
27 words
A circuit component as claimed in claim 10 wherein said wafer is formed from natural piezoelectric crystals and said resonator elements having a thickness mode of vibration.
Claim 15
Dependent Claim
48 words
A circuit component as claimed in claim 10 wherein said wafer is formed from polycrystalline non-ferroelectric material selected from the group consisting of cadmium sulfide, cadmium selenide, zinc oxide, beryllium oxide, wurtzite zinc sulfide, and solid solutions thereof; and said resonator elements having a thickness mode of vibration.
Claim 16
Dependent Claim
25 words
A circuit component as claimed in claim 10 wherein said wafer is provided with sufficient damping material to form the inactive region of said wafer.
Claim 17
Dependent Claim
19 words
A circuit component as claimed in claim 11 wherein said inactive region comprises the unpoled area of said wafer.
Claim 18
Dependent Claim
116 words
A circuit component comprising: a thin wafer of material having two major surfaces and having a piezoelectrically active region and an inactive region, at least one electrode positioned on the active region of one major surface of said wafer and counter electrode means positioned on opposite major surface of said wafer in opposition to said electrode, said one electrode and counter electrode means coacting with the intervening piezoelectric material to form at leAst one resonator element, at least one electrode positioned on the inactive region of one major surface of said wafer and counter electrode means positioned on opposite major surface of said wafer in opposition to said electrode to form at least one capacitor element.
Claim 19
Dependent Claim
116 words
A circuit component comprising: a thin wafer of material having two major surfaces and having a piezoelectrically active region and an inactive region, at least one electrode positioned on the active region of one major surface of said wafer and counter electrode means positioned on opposite major surface of said wafer in opposition to said electrode, said one electrode and counter electrode means coacting with the intervening piezoelectric material to form at leAst one resonator element, at least one electrode positioned on the inactive region of one major surface of said wafer and counter electrode means positioned on opposite major surface of said wafer in opposition to said electrode to form at least one capacitor element.
Claim 20
Dependent Claim
27 words
A circuit component as claimed in claim 16 wherein said wafer is formed from ferroelectric ceramic material, and said resonator element having a thickness mode of vibration.
Claim 21
Dependent Claim
19 words
A circuit component as claimed in claim 17 wherein said inactive region comprises the unpoled area of said wafer.
Claim 22
Dependent Claim
27 words
A circuit component as claimed in claim 16 wherein said wafer is formed from natural piezoelectric crystals and said resonator element having a thickness mode of vibration.
Claim 23
Dependent Claim
40 words
A circuit component as claimed in claim 16 wherein said wafer is formed from a crystal selected from the group consisting of quartz, zinc oxide, lithium niobate, and lithium tantalate; and said resonator elements having a thickness mode of vibration.
Claim 24
Dependent Claim
25 words
A circuit component as claimed in claim 19 wherein said wafer is provided with sufficient damping material to form the inactive region of said wafer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |