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US4970569A
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Nickel based material for a semiconductor apparatus
Assignee: Mitsubishi Electric Corp
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Filing: 1989-05-01
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Granted: 1990-11-13
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Expires: 2009-05-01
Abstract
Abstract A nickel based material for a semiconductor apparatus is provided which includes between 0.5 and 5% of at least one material selected from the group consisting of cobalt, iron, aluminum, manganese, silicon, carbon, and copper; residual nickel; and unavoidable impurties. With this nickel based material, electrical conductivity thereof can be maintained within a proper value and the plate film adhesion in silver plating nickel based products can be improved remarkably and both heat dissipation capacity and the coefficient of thermal expansion can be improved.
Inventors
- 👤 Toshihiko Mori
- 👤 Kenji Kubosono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:48
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/40; H10W70/456; C; C22; C22C; C22C19/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
62 words
A nickel-based material for use as a lead frame material or wire board material for integrated semiconductor circuits comprising between 0.5 and 5% by weight of at least one substance from the group consisting of cobalt, iron, aluminum, manganese, silicon, carbon, and copper; residual nickel; and unavoidable impurities, wherein the oxygen content of the nickel material is no more than 50 ppm.
Claim 2
Dependent Claim
62 words
A nickel-based material for use as a lead frame material or wire board material for integrated semiconductor circuits comprising between 0.5 and 5% by weight of at least one substance from the group consisting of cobalt, iron, aluminum, manganese, silicon, carbon, and copper; residual nickel; and unavoidable impurities, wherein the oxygen content of the nickel material is no more than 50 ppm.
Claim 3
Dependent Claim
62 words
The nickel-based material according to claim 1 wherein the nickel-based material has a composition comprising: 0 to 2% by weight cobalt, 0 to 0.1% by weight carbon, 0 to 0.2% by weight silicon, 0 to 0.5% by weight iron, 0 to 0.5% by weight manganese, 0 to 0.5% by weight aluminum, 0 to 2.5% by weight copper, residual nickel and unavoidable impurities.
Claim 4
Dependent Claim
43 words
The nickel-based material according to claim 2 wherein the nickel-based material has the following composition: 0.12% by weight cobalt, 0.03% by weight carbon, 0.01% by weight iron, residual nickel and unavoidable impurities and the oxygen content of the nickel material is 15 ppm.
Claim 5
Dependent Claim
43 words
The nickel-based material according to claim 2 wherein the nickel-based material has the following composition: 1.6% by weight cobalt, 0.06% by weight carbon, 0.17% by weight iron, residual nickel and unavoidable impurities and the oxygen content of he nickel material is 20 ppm.
Claim 6
Dependent Claim
47 words
The nickel-based material according to claim 2 wherein the nickel-based material has the following composition: 0.01% by weight cobalt, 0.03% by weight carbon, 0.42% by weight iron, 0.06% by weight silicon, residual nickel and unavoidable impurities and the oxygen content of the nickel material is 18 ppm.
Claim 7
Dependent Claim
47 words
The nickel-based material according to claim 2 wherein the nickel-based material has the following composition: 0.02% by weight cobalt, 0.02% by weight carbon, 0.03% by weight iron, 0.32% by weight aluminum, residual nickel and unavoidable impurities and the oxygen content of the nickel material is 23 ppm.
Claim 8
Dependent Claim
51 words
The nickel-based material according to claim 2 wherein the nickel-based material has the following composition: 0.02% by weight cobalt, 0.02% by weight carbon, 0.08% by weight manganese, 0.03% by weight iron, 0.15% by weight silicon, residual nickel and unavoidable impurities and the oxygen content of the nickel material is 12 ppm.
Claim 9
Dependent Claim
55 words
The nickel-based material according to claim 2 wherein the nickel-based material has the following composition: 0.03% by weight cobalt, 0.01% by weight carbon, 2.33% by weight copper, 0.01% by weight manganese, 0.02% by weight iron, 0.02% by weight silicon, residual nickel and unavoidable impurities and the oxygen content of the nickel material is 16 ppm.
Claim 10
Dependent Claim
55 words
The nickel-based material according to claim 2 wherein the nickel-based material has the following composition: 1.23% by weight cobalt, 0.06% by weight carbon, 1.62% by weight copper, 0.03% by weight manganese, 0.06% by weight iron, 0.02% by weight silicon, residual nickel and unavoidable impurities and the oxygen content of the nickel material is 18 ppm.
References Cited (Backward Citations)
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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) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |