US3702995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single wall domain arrangement
Assignee: AT&T Inc
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Filing: 1971-11-24
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Granted: 1972-11-14
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Expires: 1991-11-24
Abstract
Abstract A single wall domain arrangement comprises channels which are defined in a layer of magnetic material by patterns of magnetically soft elements along which domains move responsive to a magnetic field reorienting in the plane of the layer. The elements are formed by a single photoresist process resulting in the simultaneous formation of a compatible magnetoresistance detector.
Inventors
- 👤 Andrew Henry Bobeck
- 👤 Frank John Ciak
- 👤 Walter Strauss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:34
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0866
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
62 words
A magnetic arrangement comprising a layer of materiaL in which single wall domains can be moved, a fine-grained pattern of elements for defining in said layer a multiple stage path including an output stage for moving domains therealong in response to a magnetic field reorienting in the plane of said layer, consecutive ones of said stages including consecutively increasing numbers of elements.
Claim 2
Dependent Claim
62 words
A magnetic arrangement comprising a layer of materiaL in which single wall domains can be moved, a fine-grained pattern of elements for defining in said layer a multiple stage path including an output stage for moving domains therealong in response to a magnetic field reorienting in the plane of said layer, consecutive ones of said stages including consecutively increasing numbers of elements.
Claim 3
Dependent Claim
33 words
A magnetic arrangement in accordance with claim 1 wherein said pattern includes increasing numbers of elements reaching a maximum number at said output stage, said number decreasing in stages following said output stage.
Claim 4
Dependent Claim
48 words
A magnetic arrangement in accordance with claim 1 wherein said output stage comprises magnetically soft like elements laterally displaced with respect to one another and having a first width and thickness, and a common magnetically soft element interconnecting said like elements also having said first width and thickness.
Claim 5
Dependent Claim
44 words
A magnetic arrangement in accordance with claim 3 wherein a stage following said output stage also comprises magnetically soft like elements having said first width and thickness and includes a second common element, and means for electrically connecting said first and second common elements.
Claim 6
Dependent Claim
29 words
A magnetic arrangement in accordance with claim 3 wherein said like magnetically soft elements comprise V-shaped elements having apices and said common element connects said elements at said apices.
Claim 7
Dependent Claim
45 words
A magnetic arrangement in accordance with claim 4 wherein said like elements in each of said output and following stages comprise V-shaped elements having apices and said first and second common elements interconnect the apices of the elements in said output and following stage respectively.
Claim 8
Dependent Claim
58 words
A magnetic arrangement in accordance with claim 2 wherein said elements comprise magnetically soft like elements laterally displaced from one another and having a first width and thickness, and a magnetically soft common element interconnecting said elements of said output stage, said common element having a cross-sectional area to saturate magnetically when said in-plane field is aligned therewith.
Claim 9
Dependent Claim
18 words
A magnetic arrangement in accordance with claim 6 wherein said second common element also comprises magnetically soft material.
Claim 10
Dependent Claim
39 words
A magnetic arrangement in accordance with claim 8 also including means for impressing a current in said first and second common elements at a time when said in-plane field is aligned therewith, and means for providing said in-plane field.
Claim 11
Dependent Claim
33 words
A magnetic arrangement in accordance with claim 4 wherein said second common element comprises an electrically conducting material and said stage following said output stage comprises the stage next adjacent said output stage.
Claim 12
Dependent Claim
31 words
A magnetic arrangement in accordance with claim 4 wherein said second common element comprises magnetically soft material and said stage following said output stage comprises relatively few of said like elements.
Claim 13
Dependent Claim
15 words
A magnetic arrangement in accordance with claim 10 wherein said path comprises a closed loop.
Claim 14
Dependent Claim
15 words
A magnetic arrangement in accordance with claim 11 wherein said path comprises a closed loop.
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) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |