US4042951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gold-germanium alloy contacts for a semiconductor device
Assignee: Texas Instruments Inc
•
Filing: 1975-09-25
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Granted: 1977-08-16
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Expires: 1995-09-25
Abstract
Abstract A coaxial-lead, double-plug, glass-sealed semiconductor diode is provided with gold-germanium alloy contacts metallurgically bonded to Dumet alloy plugs.
Inventors
- 👤 John Thomas Robinson
- 👤 Richard A. Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:25
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/20; H10D; H10D62/00; H10D62/80; H10D62/83; H10D64/00; H10D64/60; H10D64/62; H10W70/00; H10W70/20; H10W70/24; H10W76/00; H10W76/10; H10W76/12; H10W76/13; H10W76/138; H10W72/251; H10W72/252; H10W72/29; H10W72/50; H10W72/59
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
68 words
A packaged semiconductor device comprising a semiconductor body having at least one ohmic contact on each of opposite sides thereof, sandwiched between the ends of two coaxial nickel-alloy plugs surrouned by a glass envelope sealed to said plugs, an alloy bond of one plug with one contact, and an alloy bond of the other plug with the other contact; each of said alloy bonds comprising a gold-germanium alloy.
Claim 2
Dependent Claim
68 words
A packaged semiconductor device comprising a semiconductor body having at least one ohmic contact on each of opposite sides thereof, sandwiched between the ends of two coaxial nickel-alloy plugs surrouned by a glass envelope sealed to said plugs, an alloy bond of one plug with one contact, and an alloy bond of the other plug with the other contact; each of said alloy bonds comprising a gold-germanium alloy.
Claim 3
Dependent Claim
40 words
A device as in claim 1 wherein said semiconductor body includes an anode region having one of said contacts thereon, a cathode region having the other of said contacts thereon, and the first ohmic contact of said anode comprises silver.
Claim 4
Dependent Claim
13 words
A device as in claim 1 wherein said cathode contact comprises nickel silicide.
Claim 5
Dependent Claim
31 words
A device as in claim 1 wherein said cathode contact includes a layer of nickel in contact with said silicide, and a layer of silver in contact with said gold-germanium alloy.
Claim 6
Dependent Claim
77 words
A semiconductor device comprising a coaxial-lead, double-plug, glass-sealed package having an alloy-bonded semiconductor chip therein, sandwiched between the plug ends, said chip having an anode region and a cathode region, each of said regions having an ohmic contact comprising at least two layers, including a conductor layer in contact with the semiconductor, and an outer layer bonded to one of said plug ends, said outer layer comprising a gold-germanium alloy, said plug ends comprising a nickel alloy.
Claim 7
Dependent Claim
77 words
A semiconductor device comprising a coaxial-lead, double-plug, glass-sealed package having an alloy-bonded semiconductor chip therein, sandwiched between the plug ends, said chip having an anode region and a cathode region, each of said regions having an ohmic contact comprising at least two layers, including a conductor layer in contact with the semiconductor, and an outer layer bonded to one of said plug ends, said outer layer comprising a gold-germanium alloy, said plug ends comprising a nickel alloy.
Claim 8
Dependent Claim
16 words
A device as in claim 5 wherein the conductor layer of said anode contact comprises silver.
Claim 9
Dependent Claim
17 words
A device as in claim 5 wherein the conductor layer of said cathode contact comprises nickel silicide.
Claim 10
Dependent Claim
31 words
A device as in claim 7 wherein said cathode contact includes a layer of nickel in contact with said silicide, and a layer of silver in contact with said gold-germanium alloy.
Claim 11
Dependent Claim
17 words
A device as in claim 6 wherein the conductor layer of said cathode contact comprises nickel silicide.
Claim 12
Dependent Claim
15 words
A device as in claim 5 wherein said nickel alloy consists of nickel and iron.
Claim 13
Dependent Claim
17 words
A device as in claim 10 wherein said plugs include a copper sheath surrounding the nickel alloy.
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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) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |