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US4293371A
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Method of making magnetic film-substrate composites
Assignee: Union Carbide Corp
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Filing: 1980-03-27
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Granted: 1981-10-06
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Expires: 2000-03-27
Abstract
Abstract Magnetic film-substrate composites of enhanced quality are provided by rotating a garnet substrate immersed in a melt of magnetic film material to obtain a growth of magnetic film having uniaxial anistropy on the substrate normal to the substrate surface and maintaining the immersed substrate stationary in the melt after a desired film growth has been achieved to effect enhancement of the anisotropy constant of the film.
Inventors
- 👤 Milan R. Kokta
- 👤 Roger W. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:21
CPC Classifications
C; C30; C30B; C30B19/00; C30B19/12; C30B19/02; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C30B29/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
In a method of growing a magnetic film on a garnet substrate wherein a garnet substrate of a first composition is immersed and rotated in a melt of a different composition comprising at least two different oxides which will form a film characterized by magnetic ordering in a plane substantially parallel to the surface of the melt and is withdrawn from the melt when a suitable thickness of film growth is provided on the substrate, the improvement which comprises maintaining the immersed substrate stationary in the melt after a suitable thickness of film growth is provided on the substrate for from about 0.5 seconds to 5 minutes.
Claim 2
Dependent Claim
107 words
In a method of growing a magnetic film on a garnet substrate wherein a garnet substrate of a first composition is immersed and rotated in a melt of a different composition comprising at least two different oxides which will form a film characterized by magnetic ordering in a plane substantially parallel to the surface of the melt and is withdrawn from the melt when a suitable thickness of film growth is provided on the substrate, the improvement which comprises maintaining the immersed substrate stationary in the melt after a suitable thickness of film growth is provided on the substrate for from about 0.5 seconds to 5 minutes.
Claim 3
Dependent Claim
21 words
A method in accordance with claim 1 wherein the immersed substrate is maintained stationary for from about 0.5 to 50 seconds.
Claim 4
Dependent Claim
21 words
A method in accordance with claim 1 wherein the immersed substrate is maintained stationary for from about 10 to 20 seconds.
References Cited (Backward Citations)
US3790405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |