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US4464208A
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Amorphous alloy for magnetic head
Assignee: Toshiba Corp
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Filing: 1982-12-30
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Granted: 1984-08-07
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Expires: 2002-12-30
Abstract
Abstract Disclosed is an amorphous alloy for a magnetic head, which is of the formula: (Co.sub.1-a-b-c Fe.sub.a Ru.sub.b TM.sub.c).sub.100-x-y Si.sub.x B.sub.y wherein TM is at least one of Ti, V, Cr, Mn, Ni, Zr, Nb, Mo, Hf, Ta and W, and, in atomic concentrations, 0.02≦a≦0.08, 0.07≦b≦0.2, c=0 or 0.01≦c≦0.1, 0≦x≦20 and 4≦y≦9, which is excellent in abrasion-resistance and simultaneously has high permeability.
Inventors
- 👤 Hiroshi Tateishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:42
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/153; H01F1/15316; C; C22; C22C; C22C45/00; C22C45/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
72 words
An amorphous alloy for a magnetic head, which is of the formula: (Co.sub.1-a-b-c Fe.sub.a Ru.sub.b TM.sub.c).sub.100-x-y Si.sub.x B.sub.y wherein TM is at least one selected from the group consisting of titanium(Ti), vanadium(V), chromium(Cr), manganese(Mn), nickel(Ni), zirconium(Zr), niobium(Nb), molybdenum(Mo), hafnium(Hf), tantalum(Ta) and tungsten(W), "a", "b", "c", "x" and "y" are atomic concentrations ranging from 0.02 to 0.08, 0.07 to 0.2, 0 or 0.01 to 0.1, 0 to 20, and 4 to 9, respectively.
Claim 2
Dependent Claim
72 words
An amorphous alloy for a magnetic head, which is of the formula: (Co.sub.1-a-b-c Fe.sub.a Ru.sub.b TM.sub.c).sub.100-x-y Si.sub.x B.sub.y wherein TM is at least one selected from the group consisting of titanium(Ti), vanadium(V), chromium(Cr), manganese(Mn), nickel(Ni), zirconium(Zr), niobium(Nb), molybdenum(Mo), hafnium(Hf), tantalum(Ta) and tungsten(W), "a", "b", "c", "x" and "y" are atomic concentrations ranging from 0.02 to 0.08, 0.07 to 0.2, 0 or 0.01 to 0.1, 0 to 20, and 4 to 9, respectively.
Claim 3
Dependent Claim
12 words
The amorphous alloy according to claim 1, wherein said "c" is 0.
Claim 4
Dependent Claim
17 words
The amorphous alloy according to claim 1, wherein said "c" for TM ranges from 0.01 to 0.1.
Claim 5
Dependent Claim
12 words
The amorphous alloy according to claim 3, wherein said TM is Ti.
Claim 6
Dependent Claim
12 words
The amorphous alloy according to claim 3, wherein said TM is V.
Claim 7
Dependent Claim
12 words
The amorphous alloy according to claim 3, wherein said TM is Cr.
Claim 8
Dependent Claim
12 words
The amorphous alloy according to claim 3, wherein said TM is Mn.
Claim 9
Dependent Claim
12 words
The amorphous alloy according to claim 3, wherein said TM is Ni.
Claim 10
Dependent Claim
12 words
The amorphous alloy according to claim 3, wherein said TM is Zr.
Claim 11
Dependent Claim
12 words
The amorphous alloy according to claim 3, wherein said TM is Nb.
Claim 12
Dependent Claim
12 words
The amorphous alloy according to claim 3, wherein said TM is Hf.
Claim 13
Dependent Claim
12 words
The amorphous alloy according to claim 3, wherein said TM is Mo.
Claim 14
Dependent Claim
12 words
The amorphous alloy according to claim 3, wherein said TM is Ta.
Claim 15
Dependent Claim
12 words
The amorphous alloy according to claim 3, wherein said TM is W.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |