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US3728153A
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Method of forming bubble domain system
Assignee: Boeing North American Inc
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Filing: 1970-12-21
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Granted: 1973-04-17
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Expires: 1990-12-21
Abstract
Abstract A METHOD OF FORMING A BUBBLE DOMAIN SYSTEM OF MAGNETIC MATERIAL HAVING A PORTION CONTAINING SMALL DIAMETER BUBBLE DOMAINS AND AN ADJACENT PORTION HAVING LARGER DIAMETER BUBBLE DOMAN DIAMETERS THEREIN CLUDES THE STEP OF PROVIDING A FIRST SINGLE CRYSTAL MAGNETIC NETIC FILM HAVING A SMALL BUBBLE DOMAIN DIAMETERS THEREIN AND THE FURTHER STEP OF DEPOSITING A SIDNGLE CRYSTAL MAGNETIC FILM HAVING ALOWER MAGNETIZATION LEVEL ON A SPECIFIC PORTION OF SAID FIRST FILM. THE STRUCTURE FORMED BY THIS METHOD HAS LARGE DIAMETER BUBBLE DOMAINS IN THE PORTION HAVING BOTH OF THE FILMS AND SMALL DIAMETER BUBBLES IN THE PORTION HAVING ONLY ONE FILM.
Inventors
- 👤 D Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:51
CPC Classifications
H; H01; H01F; H01F10/00; G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0858; H01F10/08; H01F10/10; H01F10/18; H01F10/20; H01F10/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |