US6093499A
Expired / Lapsed
US
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Copper alloy foils
Assignee: Nippon Mining Holdings Inc
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Filing: 1999-04-02
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Granted: 2000-07-25
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Expires: 2019-04-02
Abstract
Abstract Copper alloy foils are provided having far greater strength and heat resistance than conventional copper foils, and having better productivity, are characterized by a composition comprising, all by weight, from 0.01 to 0.4% Cr, from 0.01 to 0.25% Zr, from 0.02 to 2.0% Zn; and when necessary from 0.05 to 1.8% Fe and from 0.05 to 0.8% Ti; and when further necessary one or more elements selected from the group consisting of Ni, Sn, In, Mn, P, Mg, Al, B, As, Cd, Co, Te, Ag, and Hf in a total amount of from 0.005 to 1.5%; the balance being copper and unavoidable impurities. Inclusions in the copper foil not larger than 10 mu m in size, and the inclusions between 0.5 and 10 mu m in size number less than 100 pieces/mm2.
Inventors
- 👤 Yasuo Tomioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:52
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/04; H; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K2201/00; H05K2201/03; H05K2201/0332; H05K2201/0335; H05K2201/0355; Y; Y10; Y10S; Y10S360/00; Y10S360/90; Y10T; Y10T428/00; Y10T428/12; Y10T428/12431; Y10T428/12438
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
66 words
A copper alloy foil consisting of, all by weight, from 0.02 to 0.4% chromium, from 0.01 to 0.25% zirconium, from 0.02 to 2.0% zinc, the balance being copper and unavoidable impurities, wherein inclusions in said foil are not larger than 10 μm in size, and the number of inclusions in the foil between 0.5 and 10 μm in size less than 100 per mm 2 .
Claim 2
Dependent Claim
66 words
A copper alloy foil consisting of, all by weight, from 0.02 to 0.4% chromium, from 0.01 to 0.25% zirconium, from 0.02 to 2.0% zinc, the balance being copper and unavoidable impurities, wherein inclusions in said foil are not larger than 10 μm in size, and the number of inclusions in the foil between 0.5 and 10 μm in size less than 100 per mm 2 .
Claim 3
Dependent Claim
99 words
A copper alloy foil consisting of, all by weight, from 0.02 to 0.4% chromium, from 0.01 to 0.25% zirconium, from 0.02 to 2.0% zinc, one or more elements selected from the group consisting of nickel, tin, indium, manganese, phosphorus, magnesium, aluminum, boron, arsenic, cadmium, cobalt, tellurium, silver, and hafnium in a total amount of from 0.005 to 1.5%, the balance being copper and unavoidable impurities, wherein inclusions in said foil are not larger than 10 μm in size, and the number of inclusions in the foil between 0.5 and 10 μm in size is less than 100 per mm2.
Claim 4
Dependent Claim
99 words
A copper alloy foil consisting of, all by weight, from 0.02 to 0.4% chromium, from 0.01 to 0.25% zirconium, from 0.02 to 2.0% zinc, one or more elements selected from the group consisting of nickel, tin, indium, manganese, phosphorus, magnesium, aluminum, boron, arsenic, cadmium, cobalt, tellurium, silver, and hafnium in a total amount of from 0.005 to 1.5%, the balance being copper and unavoidable impurities, wherein inclusions in said foil are not larger than 10 μm in size, and the number of inclusions in the foil between 0.5 and 10 μm in size is less than 100 per mm2.
Claim 5
Dependent Claim
77 words
A copper alloy foil consisting of, all by weight, from 0.02 to 0.4% chromium, from 0.01 to 0.25% zirconium, from 0.02 to 2.0% zinc, from 0.05 to 1.8% iron, from 0.05 to 0.8% titanium, the balance being copper and unavoidable impurities, wherein inclusions in said foil are not larger than 10 μm in size, and the number of inclusions in the foil between 0.5 and 10 μm in size is less than 100 per mm 2 .
Claim 6
Dependent Claim
77 words
A copper alloy foil consisting of, all by weight, from 0.02 to 0.4% chromium, from 0.01 to 0.25% zirconium, from 0.02 to 2.0% zinc, from 0.05 to 1.8% iron, from 0.05 to 0.8% titanium, the balance being copper and unavoidable impurities, wherein inclusions in said foil are not larger than 10 μm in size, and the number of inclusions in the foil between 0.5 and 10 μm in size is less than 100 per mm 2 .
Claim 7
Dependent Claim
108 words
A copper alloy foil consisting of, all by weight, from 0.02 to 0.4% chromium, from 0.01 to 0.25% zirconium, from 0.02 to 2.0% zinc, from 0.05 to 1.8% iron, from 0.05 to 0.8% titanium, one or more elements selected from the group consisting of nickel, tin, indium, manganese, phosphorus, magnesium, aluminum, boron, arsenic, cadmium, cobalt, tellurium, silver, and hafnium in a total amount of from 0.005 to 1.5%, the balance being copper and unavoidable impurities, wherein inclusions in said foil are not larger than 10 μm in size, and the number of inclusions between 0.5 and 10 μm in size is less than 100 per mm 2 .
Claim 8
Dependent Claim
108 words
A copper alloy foil consisting of, all by weight, from 0.02 to 0.4% chromium, from 0.01 to 0.25% zirconium, from 0.02 to 2.0% zinc, from 0.05 to 1.8% iron, from 0.05 to 0.8% titanium, one or more elements selected from the group consisting of nickel, tin, indium, manganese, phosphorus, magnesium, aluminum, boron, arsenic, cadmium, cobalt, tellurium, silver, and hafnium in a total amount of from 0.005 to 1.5%, the balance being copper and unavoidable impurities, wherein inclusions in said foil are not larger than 10 μm in size, and the number of inclusions between 0.5 and 10 μm in size is less than 100 per mm 2 .
Claim 9
Dependent Claim
26 words
In a suspension supporting a magnetic head of a hard disc drive, the improvement comprising wiring comprised of the copper alloy foil according to claim 1.
Claim 10
Dependent Claim
26 words
In a suspension supporting a magnetic head of a hard disc drive, the improvement comprising wiring comprised of the copper alloy foil according to claim 2.
Claim 11
Dependent Claim
26 words
In a suspension supporting a magnetic head of a hard disc drive, the improvement comprising wiring comprised of the copper alloy foil according to claim 3.
Claim 12
Dependent Claim
26 words
In a suspension supporting a magnetic head of a hard disc drive, the improvement comprising wiring comprised of the copper alloy foil according to claim 4.
References Cited (Backward Citations)
US4872048A
Cited
JPH10183274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2003-07-25 | 2004-01-24 | 2004-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-07-25 | 2008-01-24 | 2008-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-07-25 | 2012-01-24 | 2012-07-25 | $7700.00 | Window Closed / Lapsed |