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US4233530A
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Elastic surface wave device
Assignee: Faurecia Clarion Electronics Co Ltd
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Filing: 1978-10-05
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Granted: 1980-11-11
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Expires: 1998-10-05
Abstract
Abstract An elastic surface wave device, especially amplifier which includes input and output means for electrical signals provided so as to be spaced on a surface of a piezoelectric material which composes a laminate in combination with a semiconductor, and an electrode provided in a surface signal wave propagation path between said input and output means for application of a d.c. bias voltage and supply of a pumping power.
Inventors
- 👤 Nobuo Mikoshiba
- 👤 Shoichi Minagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:56
CPC Classifications
H; H03; H03F; H03F7/00; H03F7/04; H03F13/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
69 words
An elastic surface wave device, comprising: a laminate composed of a semiconductor layer, a piezoelectric material layer, and a protective film layer interposed therebetween; a first electrode on a surface of said piezoelectric material layer; a d.c. bias voltage source connected to said first electrode; a pumping power source connected to said first electrode; and a second electrode on a surface of said semiconductor layer for ohmic contact therewith.
Claim 2
Dependent Claim
69 words
An elastic surface wave device, comprising: a laminate composed of a semiconductor layer, a piezoelectric material layer, and a protective film layer interposed therebetween; a first electrode on a surface of said piezoelectric material layer; a d.c. bias voltage source connected to said first electrode; a pumping power source connected to said first electrode; and a second electrode on a surface of said semiconductor layer for ohmic contact therewith.
Claim 3
Dependent Claim
38 words
An elastic surface wave device as set forth in claim 1, wherein said piezoelectric material layer has input and output means for electrical signals disposed spacedly on its surface and in the propagating path of elastic surface waves.
Claim 4
Dependent Claim
27 words
An elastic surface wave device as set forth in claim 1, wherein said piezoelectric material layer has at its one end a surface wave absorber disposed thereon.
Claim 5
Dependent Claim
28 words
An elastic surface wave device as set forth in claim 1, wherein said semiconductor layer is made of silicon and said piezoelectric layer is made of zinc oxide.
References Cited (Backward Citations)
US3388334A
Cited
US3679985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |