US4144585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bubble domain structures and method of making
Assignee: United States Department of the Air Force
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Filing: 1976-08-16
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Granted: 1979-03-13
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Expires: 1996-08-16
Abstract
Abstract A magnetic bubble domain structure and method of making comprising a film of a nickel-iron alloy of 80 to 83.5% nickel content and substantially zero constant of magnetostriction formed by vapor deposition of the alloy onto a flat substrate at a substrate temperature in the range of room temperature to 200 DEG C. at an angle of incidence of approximately 60 DEG to a film thickness of 0.2 mu m to 3.0 mu m, the film being immersed in a magnetic field perpendicular to the film and of 1600 to 2400 oersteds intensity.
Inventors
- 👤 Irena Puchalska-Hibner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:35
CPC Classifications
H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; H01F10/12; H01F10/14; H01F41/00; H01F41/14; Y; Y10; Y10S; Y10S428/00; Y10S428/90
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
104 words
The method of producing magnetic bubble domains comprising: forming a film of an alloy of 80 to 83.5 percent nickel and the remainder iron and substantially zero constant of magnetostriction by vapor deposition of said alloy in a vacuum of 2 × 10 -5 to 2 × 10 -6 Torr onto a flat substrate at a substrate temperature in the range of room temperature to 200° C. at an angle of incidence of approximately 60° and to a film thickness of 0.2 μm to 3.0 μm, and subjecting said film to a magnetic field perpendicular to the film of 1600 to 2400 oersteds intensity.
Claim 2
Independent Claim
104 words
The method of producing magnetic bubble domains comprising: forming a film of an alloy of 80 to 83.5 percent nickel and the remainder iron and substantially zero constant of magnetostriction by vapor deposition of said alloy in a vacuum of 2 × 10 -5 to 2 × 10 -6 Torr onto a flat substrate at a substrate temperature in the range of room temperature to 200° C. at an angle of incidence of approximately 60° and to a film thickness of 0.2 μm to 3.0 μm, and subjecting said film to a magnetic field perpendicular to the film of 1600 to 2400 oersteds intensity.
Claim 3
Dependent Claim
102 words
A magnetic bubble domain structure comprising: a film of an alloy of 80 to 83.5 percent nickel and the remainder iron and substantially zero constant of magnetostriction formed by vapor deposition of said alloy in a vacuum of 2 × 10 -5 to 2 × 10 -6 Torr onto a flat substrate at a substrate temperature in the range of room temperature to 200° C. at an angle of incidence of approximately 60° and to a film thickness of 0.2 μm to 3.0 μm, said film being immersed in a magnetic field perpendicular to the film of 1600 to 2400 oersteds intensity.
Claim 4
Dependent Claim
102 words
A magnetic bubble domain structure comprising: a film of an alloy of 80 to 83.5 percent nickel and the remainder iron and substantially zero constant of magnetostriction formed by vapor deposition of said alloy in a vacuum of 2 × 10 -5 to 2 × 10 -6 Torr onto a flat substrate at a substrate temperature in the range of room temperature to 200° C. at an angle of incidence of approximately 60° and to a film thickness of 0.2 μm to 3.0 μm, said film being immersed in a magnetic field perpendicular to the film of 1600 to 2400 oersteds intensity.
Claim 5
Dependent Claim
11 words
The structure of claim 2 in which said substrate is glass.
Claim 6
Dependent Claim
12 words
The structure of claim 2 in which said substrate is sodium chloride.
References Cited (Backward Citations)
GB1106710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-12 | 1982-09-11 | 1983-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-12 | 1986-09-11 | 1987-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-12 | 1990-09-11 | 1991-03-13 | $7700.00 | Window Closed / Lapsed |