US3611059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor assembly
Assignee: RCA Corp
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Filing: 1970-06-11
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Granted: 1971-10-05
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Expires: 1990-06-11
Abstract
Abstract A transistor assembly for high-frequency operation includes a housing of an electrically insulating and thermally conductive material having a passage therethrough from one end to the other end. A transistor element having collector, emitter and base electrodes is mounted in the passage adjacent one end of the housing, and is thermally connected to the housing. A separate contact terminal having a head on one end is secured to each end of the housing with the terminals being in the same plane and the heads extending across the ends of the passage so as to hermetically seal the transistor element within the housing. A metal plate is secured to the outer surface of the housing. The metal plate serves as the mounting means for the assembly, a heat dissipator and a third terminal. The electrodes of the transistor element are electrically connected to separate ones of the terminals.
Inventors
- 👤 Donald Raymond Carley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:58
CPC Classifications
H; H10; H10W; H10W40/00; H10W40/70; H10W44/00; H10W44/20; H10W44/226; H10W72/00; H10W72/071; H10W72/075; H10W72/07551; H10W72/07554; H10W72/50; H10W72/541; H10W72/5445; H10W72/547
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
114 words
-. A semiconductor assembly comprising a. a housing of an electrically insulating and thermally conductive material, said housing having a passage extending therethrough from one end of the housing to the other end, b. a semiconductor element mounted in the passage in the housing and thermally connected to said housing, said semiconductor element having a plurality of electrodes, c. a first terminal on the outer surface of said housing d. a separate pair of metal contact terminals, one secured to each end of the housing and extending over the respEctive end of the passage so as to enclose said passage, and e. means electrically connecting the electrodes of the semiconductor element to the terminals.
Claim 2
Dependent Claim
82 words
A semiconductor assembly in accordance with claim 1 in which the means electrically connecting the first terminal to one of the electrodes of the semiconductor element includes a metal film coated on one end surface of the housing and on the outer surface of the housing, and the means electrically connecting one of the contact terminals to an electrode of the semiconductor element includes a metal film coated on the surface of the passage and the other end surface of the housing.
Claim 3
Dependent Claim
77 words
A semiconductor assembly in accordance with claim 2 including a spacer ring of an electrically insulating material secured to the one end of the housing, the contact terminal at the one end of the housing is secured to the spacer ring, and the means electrically connecting the contact terminal at the one end of the housing to its electrode of the semiconductor element includes a metal film coated on the outer end surface of the spacer ring.
Claim 4
Dependent Claim
66 words
A semiconductor assembly in accordance with claim 3 including an electrically and thermally conductive mounting block within the passage in the housing, said mounting block being electrically and mechanically secured to the metal film on the surface of the passage and having one end adjacent the one end surface of the housing, and the semiconductor element is mounted on said one end of the mounting block.
Claim 5
Dependent Claim
62 words
A semiconductor assembly in accordance with claim 4 in which the electrode of the semiconductor element which is connected to the contact terminals at the other end of the housing is on the surface of the semiconductor element which is secured to the mounting block, and the other electrodes of the semiconductor element are on the other surface of the semiconductor element.
Claim 6
Dependent Claim
71 words
A semiconductor assembly in accordance with claim 5 in which one of the electrodes on the other surface of the semiconductor element is electrically connected to the metal film on the one end surface of the housing by a wire, and the other electrode on the other surface of the semiconductor element is electrically connected to the metal film on the outer end surface of the spacer ring by a wire.
Claim 7
Dependent Claim
35 words
A semiconductor assembly in accordance with claim 6 in which each of the electrodes on the other surface of the semiconductor element is electrically connected to its respective metal film by a plurality of wires.
Claim 8
Dependent Claim
100 words
A semiconductor assembly in accordance with claim 7 in which each of the contact terminals comprises a flat metal strip having a flathead on one end, the head of one of the contact terminals is secured to the metal film on the outer end surface of the spacer ring and extends completely across the passage at the one end of the housing, and the head of the other contact terminal is secured to the metal film on the other end surface of the housing and extends completely across the end of the passage at the other end of the housing.
Claim 9
Dependent Claim
34 words
A semiconductor assembly in accordance with claim 8 in which the first terminal is a metal plate which is mechanically and electrically secured to the metal film on the outer surface of the housing.
Claim 10
Dependent Claim
24 words
A semiconductor assembly in accordance with claim 9 in which the housing and the passage through the housing are rectangular in transverse cross section.
References Cited (Backward Citations)
US2791731A
Cited
US2792537A
Cited
US2984890A
Cited
US2956160A
Cited
US2987658A
Cited
US3266137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |