US3828329A
Expired / Lapsed
US
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Single wall domain propagation arrangement
Assignee: AT&T Inc
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Filing: 1972-07-24
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Granted: 1974-08-06
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Expires: 1992-07-24
Abstract
Abstract A field access, single wall domain propagation arrangement is defined by a pattern of ion implanted regions in a domain supporting layer. Either positive or negative magnetostriction effects result in changing pole patterns for domain movement in response to a magnetic field reorienting in the plane of domain layer.
Inventors
- 👤 R Fischer
- 👤 J North
- 👤 R Wolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:29
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0808; G11C19/0816
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
58 words
Magnetic domain propagation apparatus comprising a layer of material in which single wall domains can be moved, and a pattern of ion implanted regions in said layer said pattern having a geometry for defining therein a multistage path for movement of domains therealong in response to a periodic magnetic field reorienting cyclically in the plane of said layer.
Claim 2
Dependent Claim
58 words
Magnetic domain propagation apparatus comprising a layer of material in which single wall domains can be moved, and a pattern of ion implanted regions in said layer said pattern having a geometry for defining therein a multistage path for movement of domains therealong in response to a periodic magnetic field reorienting cyclically in the plane of said layer.
Claim 3
Dependent Claim
20 words
Apparatus in accordance with claim 1 wherein said layer coMprises a first surface and said regions are at said surface.
Claim 4
Dependent Claim
27 words
Apparatus in accordance with claim 2 wherein said layer has a magnetization normal to the plane of said layer and said ion implanted regions have in-plane magnetization.
Claim 5
Dependent Claim
22 words
Apparatus in accordance with claim 2 wherein said layer has an in-plane magnetization and said regions exhibit magnetization normal to the plane.
Claim 6
Dependent Claim
13 words
Apparatus in accordance with claim 2 wherein said layer comprises negative magnetostriction material.
Claim 7
Dependent Claim
13 words
Apparatus in accordance with claim 2 wherein said layer comprises positive magnetostriction material.
Claim 8
Dependent Claim
38 words
Apparatus in accordance with claim 2 wherein said layer adjacent said first surface is ion implanted except for a periodic pattern of nonimplanted regions which define said path at the interface with the implanted portions of said layer.
Claim 9
Dependent Claim
64 words
Apparatus in accordance with claim 1 wherein said layer comprises first and second sublayers each having a first surface, first and second periodic patterns of spaced apart ion implanted regions in said first and second sublayers at said first surfaces, said patterns being offset from one another in a manner to move single wall domains along said path in response to said in-plane field.
Claim 10
Dependent Claim
14 words
Apparatus in accordance with claim 2 also including means for supplying said in-plane field.
References Cited (Backward Citations)
US3643238A
Cited
US3602911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |