US3607698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epitaxial garnet films
Assignee: International Business Machines Corp
•
Filing: 1968-10-11
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Granted: 1971-09-21
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Expires: 1988-10-11
Abstract
Abstract A method of making improved garnet thin films in a sputtering apparatus. The film is sputtered from a source containing yttrium or rare earth garnet in bulk form onto a garnet substance. Epitaxial films with square hysteresis loops are obtained only when the garnet substrate is in the (111) orientation.
Inventors
- 👤 Eric Kay
- 👤 Erich Sawatzky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:38
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/08; H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; H01F10/18; H01F10/20; H01F10/24; H01F41/00; H01F41/14; H01F41/18; H01F41/186
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
The method claimed in claim 1 wherein the substrate is nonmagnetic garnet and the film is a ferrimagnetic garnet.
Claim 2
Dependent Claim
16 words
The method claimed in claim 1, wherein the substrate is Y3Al5012 and the film is Gd3Fe5012.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |