US4243960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and materials for tuning the center frequency of narrow-band surface-acoustic-wave (SAW) devices by means of dielectric overlays
Assignee: United States Department of the Navy
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Filing: 1978-08-14
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Granted: 1981-01-06
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Expires: 1998-08-14
Abstract
Abstract A method and device for adjusting the center frequency after fabrication of surface acoustic wave (SAW) devices by the deposition of a nonconducting coating which alters the SAW propagation velocity of the device.
Inventors
- 👤 David J. White
- 👤 Carl N. Helmick, Jr.
- 👤 Robert E. Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:51
CPC Classifications
H; H03; H03H; H03H3/00; H03H3/007; H03H3/08; H03H3/10; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
72 words
A surface acoustic wave device comprising; a substrate, for supporting the propagation of surface acoustic waves; an input transducer formed on said substrate for producing surface acoustic waves; an output transducer formed on said substrate, for receiving surface acoustic waves; and an electrically nonconducting film deposited on and in contact with said substrate and transducers, said film having a predetermined thickness to obtain a desired center frequency of said surface acoustic waves.
Claim 2
Dependent Claim
72 words
A surface acoustic wave device comprising; a substrate, for supporting the propagation of surface acoustic waves; an input transducer formed on said substrate for producing surface acoustic waves; an output transducer formed on said substrate, for receiving surface acoustic waves; and an electrically nonconducting film deposited on and in contact with said substrate and transducers, said film having a predetermined thickness to obtain a desired center frequency of said surface acoustic waves.
Claim 3
Dependent Claim
16 words
A surface acoustic wave device as in claim 1 wherein said nonconducting film is aluminum oxide.
Claim 4
Dependent Claim
78 words
A surface acoustic wave device comprising: a substrate having a transducer region for supporting the propagation of surface acoustic waves; an input transducer formed on said substrate, for producing surface acoustic waves; an output transducer formed on said substrate for receiving surface acoustic waves; and an electrically nonconducting film deposited on and in contact with the transducer region of said substrate said film having a predetermined thickness to obtain a desired center frequency of said surface acoustic waves.
Claim 5
Dependent Claim
78 words
A surface acoustic wave device comprising: a substrate having a transducer region for supporting the propagation of surface acoustic waves; an input transducer formed on said substrate, for producing surface acoustic waves; an output transducer formed on said substrate for receiving surface acoustic waves; and an electrically nonconducting film deposited on and in contact with the transducer region of said substrate said film having a predetermined thickness to obtain a desired center frequency of said surface acoustic waves.
Claim 6
Dependent Claim
99 words
A surface acoustic wave device comprising; a substrate having an input and output transducer regions for supporting the propagation of surface acoustic waves, and an input transducer formed on said substrate for producing surface acoustic waves; multiple output transducers formed on said substrate for receiving surface acoustic waves; and an electrically nonconducting film of predetermined thickness deposited over one output transducer region of said substrate for adjusting the center frequency of that output transducer; a second electrically nonconducting film of adjustable thickness deposited over a second output transducer region for adjusting the center frequency of the second output transducer.
Claim 7
Dependent Claim
99 words
A surface acoustic wave device comprising; a substrate having an input and output transducer regions for supporting the propagation of surface acoustic waves, and an input transducer formed on said substrate for producing surface acoustic waves; multiple output transducers formed on said substrate for receiving surface acoustic waves; and an electrically nonconducting film of predetermined thickness deposited over one output transducer region of said substrate for adjusting the center frequency of that output transducer; a second electrically nonconducting film of adjustable thickness deposited over a second output transducer region for adjusting the center frequency of the second output transducer.
Claim 8
Dependent Claim
100 words
A surface acoustic wave device comprising: a substrate having input and output transducer regions for supporting the propagation of surface acoustic waves; multiple input transducers formed on said substrate for launching surface acoustic waves; an output transducer formed on said substrate for receiving surface acoustic waves; an electrically nonconducting film deposited on and in contact with one input region of said substrate for adjusting the center frequency of that input transducers; and a second electrically nonconducting film deposited on and in contact with a second input region of said substrate for adjusting the center frequency of the second input transducer.
Claim 9
Dependent Claim
100 words
A surface acoustic wave device comprising: a substrate having input and output transducer regions for supporting the propagation of surface acoustic waves; multiple input transducers formed on said substrate for launching surface acoustic waves; an output transducer formed on said substrate for receiving surface acoustic waves; an electrically nonconducting film deposited on and in contact with one input region of said substrate for adjusting the center frequency of that input transducers; and a second electrically nonconducting film deposited on and in contact with a second input region of said substrate for adjusting the center frequency of the second input transducer.
Claim 10
Dependent Claim
63 words
A surface acoustic wave device comprising: a substrate, for supporting the propagation of surface acoustic waves; an input transducer formed on said substrate for producing surface acoustic waves; an output transducer formed on said substrate, for receiving surface acoustic waves; and an electrically nonconducting cadmium sulfide film deposited on and in contact with said substrate and transducers, for adjusting the center frequency thereof.
Claim 11
Dependent Claim
63 words
A surface acoustic wave device comprising: a substrate, for supporting the propagation of surface acoustic waves; an input transducer formed on said substrate for producing surface acoustic waves; an output transducer formed on said substrate, for receiving surface acoustic waves; and an electrically nonconducting cadmium sulfide film deposited on and in contact with said substrate and transducers, for adjusting the center frequency thereof.
Claim 12
Dependent Claim
63 words
A surface acoustic wave device comprising: a substrate, for supporting the propagation of surface acoustic waves; an input transducer formed on said substrate for producing surface acoustic waves; an output transducer formed on said substrate, for receiving surface acoustic waves; and an electrically nonconducting zinc sulfide film deposited on and in contact with said substrate and transducers, for adjusting the center frequency thereof.
Claim 13
Dependent Claim
63 words
A surface acoustic wave device comprising: a substrate, for supporting the propagation of surface acoustic waves; an input transducer formed on said substrate for producing surface acoustic waves; an output transducer formed on said substrate, for receiving surface acoustic waves; and an electrically nonconducting zinc sulfide film deposited on and in contact with said substrate and transducers, for adjusting the center frequency thereof.
Claim 14
Dependent Claim
63 words
A surface acoustic wave device comprising: a substrate, for supporting the propagation of surface acoustic waves; an input transducer formed on said substrate for producing surface acoustic waves; an output transducer formed on said substrate, for receiving surface acoustic waves; and an electrically nonconducting silicon dioxide film deposited on and in contact with said substrate and transducers, for adjusting the center frequency thereof.
Claim 15
Dependent Claim
63 words
A surface acoustic wave device comprising: a substrate, for supporting the propagation of surface acoustic waves; an input transducer formed on said substrate for producing surface acoustic waves; an output transducer formed on said substrate, for receiving surface acoustic waves; and an electrically nonconducting silicon dioxide film deposited on and in contact with said substrate and transducers, for adjusting the center frequency thereof.
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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) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |