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US4473415A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of manufacturing an amorphous magnetic alloy

Assignee: Sony Corp
•
Filing: 1982-12-20
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Granted: 1984-09-25
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Expires: 2002-12-20
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Abstract

Abstract A method of manufacturing an amorphous magnetic alloy having high permeability comprises the steps of: preparing an amorphous magnetic alloy ribbon having major surfaces; annealing said magnetic alloy ribbon at a temperature lower than the crystallization temperature of said alloy under the application of a first magnetic field in a first direction along said major surface for a period sufficient to induce a magnetic anisotropy in said first direction; and annealing said magnetic alloy ribbon at a temperature lower than the crystallization temperature of said alloy under the application of a second magnetic field in a second direction perpendicular to said first direction along said major surface until the induced magnetic anisotropies in said first and second directions become equal to each other.

Inventors

  • 👤 Yoshitaka Ochiai
  • 👤 Yoshimi Makino
  • 👤 Koichi Aso
  • 👤 Satoru Uedaira
  • 👤 Masatoshi Hayakawa
  • 👤 Kazuhide Hotai

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 06:01
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/147; H01F1/153; H01F1/15341; C; C22; C22F; C22F3/00

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 133 words
A method of manufacturing an amorphous magnetic alloy having high permeablility comprising the steps of: preparing an amorphous magnetic alloy ribbon having major surfaces; annealing said magnetic alloy ribbon at a temperature lower than the crystallization temperature of said alloy under the application of a first magnetic field in a first direction along one major surface for a period sufficient to induce a magnetic anisotropy in said first direction; and annealing said magnetic alloy ribbon after termination of the application of said first magnetic field at a temperature lower than the crystallization temperature of said alloy under the application of a second magnetic field in a second direction perpendicular to said first direction along said major surface until the induced magnetic anisotropies in said first and second directions become equal to each other.
Claim 2
Independent Claim 133 words
A method of manufacturing an amorphous magnetic alloy having high permeablility comprising the steps of: preparing an amorphous magnetic alloy ribbon having major surfaces; annealing said magnetic alloy ribbon at a temperature lower than the crystallization temperature of said alloy under the application of a first magnetic field in a first direction along one major surface for a period sufficient to induce a magnetic anisotropy in said first direction; and annealing said magnetic alloy ribbon after termination of the application of said first magnetic field at a temperature lower than the crystallization temperature of said alloy under the application of a second magnetic field in a second direction perpendicular to said first direction along said major surface until the induced magnetic anisotropies in said first and second directions become equal to each other.

References Cited (Backward Citations)

US4116728A Cited
US4116728B1 Cited
US4268325A Cited
US4379004A Cited
US4312683A Cited
JPS5644746A Cited
JPS5669360A Cited
JPS5714646A Cited
GB2088415A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-09-25 1988-03-26 1988-09-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-09-25 1992-03-26 1992-09-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-09-25 1996-03-26 1996-09-25 $7700.00 Window Closed / Lapsed

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