Patent US3715736A successfully refreshed from Google Patents.
US3715736A
Expired / Lapsed
US
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Magnetic bubble domain system
Assignee: Boeing North American Inc
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Filing: 1971-04-01
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Granted: 1973-02-06
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Expires: 1991-04-01
Abstract
Abstract A magnetic bubble domain system having localized areas of spatial stability for bubble domains is disclosed. The bubble domain system includes a thin film of single crystal magnetic bubble domain material on a single crystal substrate. The film has a plurality of isolated thick portions surrounded by thinner regions. The bubble domains when formed preferentially move into the thick portions. The surrounding relatively thin regions of film serve as energy barriers to the movement of the bubble domains and confine the bubble domains in the relatively thick portions of the film. Bubble domains may be moved to and from the thick portions in a plurality of directions.
Inventors
- 👤 Donnell C O
- 👤 G Pulliam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:42
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0808
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
115 words
A magnetic bubble domain system having localized areas of spatial stability for bubble domains comprising a substrate, a thin film of magnetic bubble domain material on said substrate, a first portion of said film having a first thickness, said first portion being surrounded by a first region of said film having a thickness less than said first portion, and a second portion of said film having a second thickness, said second portion being surrounded by a second region of said film having a thickness less than said second portion, said second portion being in spaced relation with said first portion wherein a bubble domain may be moved from said first portion to said second portion.
Claim 2
Dependent Claim
115 words
A magnetic bubble domain system having localized areas of spatial stability for bubble domains comprising a substrate, a thin film of magnetic bubble domain material on said substrate, a first portion of said film having a first thickness, said first portion being surrounded by a first region of said film having a thickness less than said first portion, and a second portion of said film having a second thickness, said second portion being surrounded by a second region of said film having a thickness less than said second portion, said second portion being in spaced relation with said first portion wherein a bubble domain may be moved from said first portion to said second portion.
Claim 3
Dependent Claim
120 words
A magnetic bubble domain system having localized areas of Spatial stability for bubble domains comprising a substrate, a thin film of magnetic bubble domain material on said substrate, a first portion of said film having a first thickness, said first portion being surrounded by a first region of said film having a thickness less than said first portion, and a plurality of portions of said film having a second thickness, said plurality of portions being surrounded each by a region of said film having a thickness less than said plurality of portions, said plurality of portions being in spaced relation with said first portion wherein a bubble domain may be moved from said first portion to said plurality of portions.
Claim 4
Dependent Claim
120 words
A magnetic bubble domain system having localized areas of Spatial stability for bubble domains comprising a substrate, a thin film of magnetic bubble domain material on said substrate, a first portion of said film having a first thickness, said first portion being surrounded by a first region of said film having a thickness less than said first portion, and a plurality of portions of said film having a second thickness, said plurality of portions being surrounded each by a region of said film having a thickness less than said plurality of portions, said plurality of portions being in spaced relation with said first portion wherein a bubble domain may be moved from said first portion to said plurality of portions.
Claim 5
Dependent Claim
26 words
A magnetic bubble domain system as described in claim 2 wherein the thickness of said first portion is substantially the same as said plurality of portions.
Claim 6
Dependent Claim
24 words
A magnetic bubble domain system as described in claim 2 wherein said plurality of portions are arranged in a pattern around said first portion.
Claim 7
Dependent Claim
28 words
A magnetic bubble domain system as described in claim 2 wherein at least two of said plurality of portions are arranged on opposite sides of said first portion.
Claim 8
Dependent Claim
34 words
A magnetic bubble domain system as described in claim 2 wherein at least two of said plurality of portions are spaced so as to form an angle of about 90* with said first portion.
Claim 9
Dependent Claim
19 words
A magnetic bubble domain system as described in claim 2 wherein the shape of said first portion is round.
Claim 10
Dependent Claim
181 words
A magnetic bubble domain system having localized areas of spatial stability for bubble domains comprising, a substrate, a thin film of magnetic bubble domain material on said substrate, a first portion of said film having a first thickness, said first portion being surrounded by a first region of said film having a thickness less than said first portion, a second portion of said film having a second thickness, said second portion being surrounded by a second region of said film having a thickness less than said second portion, said second portion being in spaced relation in an ''''X'''' type direction with said first portion wherein a bubble domain may be moved from said first portion to said second portion, and a third portion of said film having a third thickness, said third portion being surrounded by a third region of said film having a thickness less than said third portion, said third portion being in spaced relation in a ''''Y'''' type direction with said first portion wherein a bubble domain may be moved from said first portion to said third portion.
Claim 11
Dependent Claim
181 words
A magnetic bubble domain system having localized areas of spatial stability for bubble domains comprising, a substrate, a thin film of magnetic bubble domain material on said substrate, a first portion of said film having a first thickness, said first portion being surrounded by a first region of said film having a thickness less than said first portion, a second portion of said film having a second thickness, said second portion being surrounded by a second region of said film having a thickness less than said second portion, said second portion being in spaced relation in an ''''X'''' type direction with said first portion wherein a bubble domain may be moved from said first portion to said second portion, and a third portion of said film having a third thickness, said third portion being surrounded by a third region of said film having a thickness less than said third portion, said third portion being in spaced relation in a ''''Y'''' type direction with said first portion wherein a bubble domain may be moved from said first portion to said third portion.
Claim 12
Dependent Claim
284 words
A magnetic bubble domain system having localized areas of spatial stability for bubble domains comprising, a substrate, a thin film of magnetic bubble domain material on said substrate, a first portion of said film having a first thickness, said first portion being surrounded by a first region of said film having a thickness less than said first portion, a second portion of said film having a second thickness, said second portion being surrounded by a second region of said film having a thickness less than said second portion, said second portion being in spaced relation with said first portion wherein a bubble domain may be moved moved from said first portion to said second portion, a third portion of said film having a third thickness, said third portion being surrounded by a third region of said film having a thickness less than said third portion, said third portion being in spaced relation with said first portion wherein a bubble domain may be moved from said first portion to said third portion, a fourth portion of said film having a fourth thickness, said fourth portion being surrounded by a fourth region of said film having a thickness less than said fourth portion, said fourth portion being in spaced relation with said first portion wherein a bubble domain may be moved from said first portion to said fourth portion, and a fifth portion of said film having a fifth thickness, said fifth portiOn being surrounded by a fifth region of said film having a thickness less than said fifth portion, said fifth portion being in spaced relation with said first portion wherein a bubble domain may be moved from said first portion to said fifth portion.
Claim 13
Dependent Claim
284 words
A magnetic bubble domain system having localized areas of spatial stability for bubble domains comprising, a substrate, a thin film of magnetic bubble domain material on said substrate, a first portion of said film having a first thickness, said first portion being surrounded by a first region of said film having a thickness less than said first portion, a second portion of said film having a second thickness, said second portion being surrounded by a second region of said film having a thickness less than said second portion, said second portion being in spaced relation with said first portion wherein a bubble domain may be moved moved from said first portion to said second portion, a third portion of said film having a third thickness, said third portion being surrounded by a third region of said film having a thickness less than said third portion, said third portion being in spaced relation with said first portion wherein a bubble domain may be moved from said first portion to said third portion, a fourth portion of said film having a fourth thickness, said fourth portion being surrounded by a fourth region of said film having a thickness less than said fourth portion, said fourth portion being in spaced relation with said first portion wherein a bubble domain may be moved from said first portion to said fourth portion, and a fifth portion of said film having a fifth thickness, said fifth portiOn being surrounded by a fifth region of said film having a thickness less than said fifth portion, said fifth portion being in spaced relation with said first portion wherein a bubble domain may be moved from said first portion to said fifth portion.
Claim 14
Independent Claim
70 words
A method of controlling the spatial stability of bubble domains in a bubble domain system having a film of bubble domain material associated with the substrate comprising the steps of forming a plurality of distinct portions in said film having a first thickness which are surrounded by a region of film material having a thickness less than said portion whereby bubble domains are restrained in said portions by said regions.
Claim 15
Independent Claim
70 words
A method of controlling the spatial stability of bubble domains in a bubble domain system having a film of bubble domain material associated with the substrate comprising the steps of forming a plurality of distinct portions in said film having a first thickness which are surrounded by a region of film material having a thickness less than said portion whereby bubble domains are restrained in said portions by said regions.
Claim 16
Dependent Claim
16 words
A method as described in claim 10 whereby said portions are formed by etching the film.
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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |