US4212688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy for magnetoresistive element and method of manufacturing the same
Assignee: Sony Corp
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Filing: 1978-11-01
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Granted: 1980-07-15
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Expires: 1998-11-01
Abstract
Abstract An alloy for a magnetoresistive element has an ordered phase with superstructure and consists of nickel and cobalt atoms, and the ratio of the nickel atoms to the cobalt atoms by the number of atoms is substantially within the range of 40:60 to 60:40. A method of manufacturing an alloy for a magnetoresistive element includes the steps of preparing a substrate for a magnetoresistive element, and forming so a nickel-cobalt alloy film on the substrate at the temperature of more than 250 DEG C. that the alloy has an ordered phase with superstructure and the ratio of the nickel atoms to the cobalt atoms by the number of atoms is within the range of 40:60 to 60:40.
Inventors
- 👤 Yoshimi Makino
- 👤 Tsutomu Okamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:02
CPC Classifications
H; H10; H10N; H10N50/00; H10N50/80; H10N50/85; C; C22; C22C; C22C19/00; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; H01F1/068; H01F41/00; H01F41/14
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
52 words
An alloy for a magnetoresistive element having a small magnetostriction constant and a large magnetoresistance anisotropy ratio, said alloy having an ordered phase with superstructure and consisting of nickel and cobalt atoms, the atomic ratio of said nickel atoms to said cobalt atoms being substantially within the range of 40:60 to 60:40.
Claim 2
Dependent Claim
52 words
An alloy for a magnetoresistive element having a small magnetostriction constant and a large magnetoresistance anisotropy ratio, said alloy having an ordered phase with superstructure and consisting of nickel and cobalt atoms, the atomic ratio of said nickel atoms to said cobalt atoms being substantially within the range of 40:60 to 60:40.
Claim 3
Dependent Claim
24 words
An alloy for a magnetoresistive element according to claim 1, in which the ratio of said nickel atoms to said cobalt atoms is 54:46.
Claim 4
Dependent Claim
21 words
An alloy for a magnetoresistive element according to claim 1, in which said superstructure is based on the CuAu I type.
Claim 5
Dependent Claim
21 words
An alloy for a magnetoresistive element accordng to claim 1 in which said superstructure is based on the CuAu II type.
Claim 6
Independent Claim
71 words
A method of manufacturing an alloy for a magnetoresistive element comprising the steps of providing a substrate for a magnetoresistive element, and forming a nickel-cobalt alloy film on said substrate while said substrate is at a temperature of more than 250° C. such that said alloy has an ordered phase with superstructure and the ratio of said nickel atoms to said cobalt atoms is within the range of 40:60 to 60:40.
Claim 7
Independent Claim
71 words
A method of manufacturing an alloy for a magnetoresistive element comprising the steps of providing a substrate for a magnetoresistive element, and forming a nickel-cobalt alloy film on said substrate while said substrate is at a temperature of more than 250° C. such that said alloy has an ordered phase with superstructure and the ratio of said nickel atoms to said cobalt atoms is within the range of 40:60 to 60:40.
Claim 8
Dependent Claim
28 words
A method of manufacturing an alloy for a magnetoresistive element according to claim 5, in which the ratio of said nickel atoms to said cobalt atoms is 54:46.
Claim 9
Dependent Claim
25 words
A method of manufacturing an alloy for a magnetoresistive element according to claim 5, in which said superstructure is based on the CuAu I type.
Claim 10
Dependent Claim
25 words
A method of manufacturing an alloy for a magnetoresistive element according to claim 5, in which said superstructure is based on the CuAu II type.
Claim 11
Dependent Claim
27 words
A method of manufacturing an alloy for a magnetoresistive element according to claim 5, in which said nickel-cobalt alloy film is formed on said substrate by evaporation.
Claim 12
Dependent Claim
28 words
A method of manufacturing an alloy for a magnetoresistive element according to claim 9, in which the thickness of said nickel-cobalt alloy film is less than 10000 A.
Claim 13
Dependent Claim
32 words
A method of manufacturing an alloy for a magnetoresistive element according to claim 10, in which the thickness of said nickel-cobalt alloy film is within the range of 1000 to 3000 A.
Claim 14
Dependent Claim
35 words
A method of manufacturing an alloy for a magnetoresistive element according to claim 9, in which said nickel-cobalt alloy film is formed on said substrate by evaporation at the temperature of 250° to 500° C.
Claim 15
Dependent Claim
35 words
A method of manufacturing an alloy for a magnetoresistive element according to claim 12, in which said nickel-cobalt alloy film is formed on said substrate by evaporation at the temperature of 300° to 500° C.
Claim 16
Dependent Claim
35 words
A method of manufacturing an alloy for a magnetoresistive element according to claim 9, in which said nickel-cobalt alloy film is formed on said substrate by evaporation at the speed of 20 to 100 A/sec.
Claim 17
Dependent Claim
35 words
A method of manufacturing an alloy for a magnetoresistive element according to claim 14, in which said nickel-cobalt alloy film is formed on said substrate by evaporation at the speed of 40 to 80 A/sec.
References Cited (Backward Citations)
US4093453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-15 | 1984-01-14 | 1984-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-15 | 1988-01-14 | 1988-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-15 | 1992-01-14 | 1992-07-15 | $7700.00 | Window Closed / Lapsed |