US3686545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in a mechanical force-to-electric signal transducer having a liquid body pressing member
Assignee: Panasonic Holdings Corp
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Filing: 1969-12-29
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Granted: 1972-08-22
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Expires: 1989-12-29
Abstract
Abstract A pressure sensitive electric transducer including a solid-state device whose electric characteristics vary in response to application of an input pressing force to an operation area thereof by a rigid body pressing member in the form of a minute sphere. The pressure receiving area of the solid-state device is provided with a soft metal film and the rigid body pressing member is provided with a metal film capable of forming a eutectic alloy with the soft metal film on the surface of the solid-state device, the two metal films then being bonded together by thermo-compression bonding thereby bonding the minute sphere to the operation area of the solid-state device.
Inventors
- 👤 Masami Shoji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:04
CPC Classifications
H; H04; H04R; H04R23/00; H04R23/006; H10; H10D; H10D99/00; H10P; H10P95/00; H10W; H10W72/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
A pressure-sensitive electric transducer as defined in claim 1, wherein one metal selected from a group consisting of gold, aluminum, copper and lead-tin-solder is chosen as a material for said soft metal film, and one metal selected from a group consisting of aluminum, copper, gold and nickel, which is easy to form a eutectic alloy with said soft metal at a low temperature, is chosen as a material for said metal film to be provided on the rigid body pressing means.
Claim 2
Dependent Claim
17 words
A pressure sensitive electric transducer as defined in claim 2, wherein said soft metal film is gold.
Claim 3
Dependent Claim
25 words
A pressure sensitive electric transducer as defined in claim 3, wherein said metal film to be provided on the rigid body pressing means is aluminum.
Claim 4
Dependent Claim
25 words
A pressure sensitive electric transducer as defined in claim 3, wherein said metal film to be provided on the rigid body pressing means is copper.
Claim 5
Dependent Claim
25 words
A pressure sensitive electric transducer as defined in claim 3, wherein said metal film to be provided on the rigid body pressing means is nickel.
Claim 6
Dependent Claim
17 words
A pressure sensitive electric transducer as defined in claim 2, wherein said soft metal film is copper.
Claim 7
Dependent Claim
25 words
A pressure sensitive electric transducer as defined in claim 7, wherein said metal film to be provided on the rigid body pressing means is aluminum.
Claim 8
Dependent Claim
17 words
A pressure sensitive electric transducer as defined in claim 2, wherein said soft metal film is lead-tin-solder.
Claim 9
Dependent Claim
17 words
A pressure sensitive electric transducer as defined in claim 2, wherein said soft metal film is aluminum.
Claim 10
Dependent Claim
25 words
A pressure sensitive electric transducer as defined in claim 10, wherein said metal film to be provided on the rigid body pressing means is nickel.
References Cited (Backward Citations)
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US3241011A
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US3443041A
Cited
US3518508A
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Cited
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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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |