US3798746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making acousto-optic devices
Assignee: RCA Corp
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Filing: 1972-10-10
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Granted: 1974-03-26
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Expires: 1992-10-10
Abstract
Abstract Acousto-optic devices comprising a transducer bonded to an acousto-optic medium having improved bonds are made by a process whereby the surfaces to be joined are first roughened, a primer metal layer is coated onto the acousto-optic medium, which primer metal is the metal which is chemically bonded to oxygen in the acousto-optic medium, the primer layer is cooled, a layer of a conductive metal and a layer of indium are deposited onto both surfaces to be bonded and the indium layers pressed together in a vacuum.
Inventors
- 👤 Alphonse Gerard
- 👤 G Bodeep
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:08
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/001; B23K20/00; B23K20/22; B23K20/233; G; G02; G02F; G02F1/00; G02F1/01; G02F1/11; H; H10; H10W; H10W72/00; H10W72/50; H10W72/59; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
29 words
depositing a primer metal layer onto the surface of said acousto-optic medium to be bonded, which primer metal is the metal chemically bonded to oxygen in said acousto-optic medium,
Claim 2
Dependent Claim
19 words
A method according to claim 1 wherein said acousto-optic medium is lead molybdate and said primer metal is molybdenum.
Claim 3
Dependent Claim
36 words
A method according to claim 2 wherein said molybdenum layer is from about 200-500 A thick, said conductive metal layers are from about 1,000-5,000 A thick and said indium layers are from about 1,000-5,000 A thick.
Claim 4
Dependent Claim
5 words
cooling said primer metal layer,
Claim 5
Dependent Claim
18 words
depositing a conductive metal layer onto said primer layer and onto said roughened transducer surface to be bonded,
Claim 6
Dependent Claim
12 words
A method according to claim 3 wherein said conductive layer is gold.
Claim 7
Dependent Claim
19 words
A method according to claim 1 wherein said bonded transducer is lapped down to about 15 microns or less.
Claim 8
Dependent Claim
11 words
depositing an indium layer on each of said conductive layers, and
Claim 9
Dependent Claim
25 words
bonding said acousto-optic medium and said transducer by pressing said indium coated surfaces together in a vacuum at ambient temperature with from about 2,000-10,000 psi.
References Cited (Backward Citations)
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US2957236A
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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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |