Patent FR1110544A successfully refreshed from Google Patents.
US3573099A
Expired / Lapsed
US
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Process for making garnet films
Assignee: International Business Machines Corp
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Filing: 1969-12-22
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Granted: 1971-03-30
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Expires: 1989-12-22
Abstract
Abstract CRACK FREE GARNET FILMS ARE DEPOSITED ON A GLASS SUBSTRATE. THE GLASS SUBSTRATE MUST HAVE A LOW LEAD CONTENT AND A THERMAL EXPANSION COEFFICIENT WITHIN THE RANGE 85X10**7 TO 105X10**7 AND AN ANNEALING TEMPERATURE OF ABOVE 750*C. GD3FE5O12 IS DEPOSITED IN A PLURALITY OF LAYERS, THE FIRST ONE OF WHICH IS LESS THAN 0.25 MICRON THICK. THE FIRST LAYER IS HEATED TO COMPLETE CRYSTALLIZATION PRIOR TO DEPOSITING ANY ADDITIONAL LAYER. THERE IS A FINAL HEATING TO COMPLETE CRYSTALLIZATION AFTER THE LAST DEPOSITION.
Inventors
- 👤 Eugene B Moore
- 👤 Daniel A Nepela
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:38
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/14; H01F41/24; H01F41/28; C; C30; C30B; C30B7/00; C30B7/005; H01F10/00; H01F10/08; H01F10/10; H01F10/18; H01F10/20; H01F10/24; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 0
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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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |