Patent US3736577A successfully refreshed from Google Patents.
US3736577A
Expired / Lapsed
US
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Domain transfer between adjacent magnetic chips
Assignee: International Business Machines Corp
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Filing: 1970-12-31
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Granted: 1973-05-29
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Expires: 1990-12-31
Abstract
Abstract A structure for cylindrical, single wall magnetic domains using a plurality of magnetic chips to achieve large size devices, such as long shift registers. The magnetic chips are pieced together and domain propagation from one chip to another is effected by an interaction between domains located on adjacent chips. The domains themselves are not able to cross the boundary between adjacent chips. Propagation means in one chip brings domains representing information bits in that chip closely enough to a second chip that these domains will magnetically interact with other domains in the second chip, causing the domains in the second chip to then propagate as information bits. Consequently, a large device is comprised of a number of smaller segments which cooperatively interact. This overcomes the constraint of bit capacity limitation due to the dimensions of magnetic chips. This also facilitates the combined use of chips with different properties as designed for different functions.
Inventors
- 👤 H Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:06
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0875; G11C19/0883
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
69 words
A magnetic device for cylindrical magnetic domains, comprising: a magnetic sheet comprised of a plurality of discrete magnetic chips adjacent one another, said domains being able to propagate in each said chip but not being able to propagate across the boundary between said chips; means located in each chip for propagating domains to positions sufficiently near said boundary that domains in adjacent chips can magnetically interact with one another.
Claim 2
Dependent Claim
69 words
A magnetic device for cylindrical magnetic domains, comprising: a magnetic sheet comprised of a plurality of discrete magnetic chips adjacent one another, said domains being able to propagate in each said chip but not being able to propagate across the boundary between said chips; means located in each chip for propagating domains to positions sufficiently near said boundary that domains in adjacent chips can magnetically interact with one another.
Claim 3
Dependent Claim
15 words
The device of claim 1, where said chips include domain generators for producing said domains.
Claim 4
Dependent Claim
26 words
The device of claim 1, where at least one of said chips includes a detector for sensing the presence and absence of domains in that chip.
Claim 5
Independent Claim
144 words
A device for magnetic cylindrical domains, comprising: a plurality of magnetic chips, sadi chips being adjacent one another and in substantially the same plane; means for producing a bias magnetic field for stabilizing the domains in each magnetic chip; means for creating information in a first one of said chips represented by the presence and absence of said domains in that chip; means for propagating said domains in said first chip to the boundary of said first chip and a second chip, said domains being able to propagate in each said chip but not being able to propagate across the boundary between said chips; means for producing domains in said second chip which magnetically interact with said information domains in said first chip, said interaction deflecting domains representative of said information in said first chip, thereby reproducing said information domains in said second chip.
Claim 6
Independent Claim
144 words
A device for magnetic cylindrical domains, comprising: a plurality of magnetic chips, sadi chips being adjacent one another and in substantially the same plane; means for producing a bias magnetic field for stabilizing the domains in each magnetic chip; means for creating information in a first one of said chips represented by the presence and absence of said domains in that chip; means for propagating said domains in said first chip to the boundary of said first chip and a second chip, said domains being able to propagate in each said chip but not being able to propagate across the boundary between said chips; means for producing domains in said second chip which magnetically interact with said information domains in said first chip, said interaction deflecting domains representative of said information in said first chip, thereby reproducing said information domains in said second chip.
Claim 7
Dependent Claim
14 words
The device of claim 4, where said chips are comprised of the same materials.
Claim 8
Dependent Claim
15 words
The device of claim 4, including means to detect said domains located on said chips.
Claim 9
Dependent Claim
47 words
The device of claim 4, where each chip includes means for propagating domains in that chip to the boundary between that chip and another chip, said domains and adjacent chips being brought sufficiently close to one another that there stray magnetic fields can interact with one another.
Claim 10
Dependent Claim
15 words
The device of claim 4, where said chips are thin films grown on a substrate.
Claim 11
Independent Claim
77 words
A device for cylindrical, magnetic domains, comprising: first and second magnetic chips, each of which is capable of supporting the propagation of said domains therein, said domains not being able to propagate from said first chip to said second chip; means for propagating said domains in each chip to positions sufficiently close that domains in said first and second chips magnetically interact with one another, said interaction causing domains in said second chip to be spatially deflected.
Claim 12
Independent Claim
77 words
A device for cylindrical, magnetic domains, comprising: first and second magnetic chips, each of which is capable of supporting the propagation of said domains therein, said domains not being able to propagate from said first chip to said second chip; means for propagating said domains in each chip to positions sufficiently close that domains in said first and second chips magnetically interact with one another, said interaction causing domains in said second chip to be spatially deflected.
Claim 13
Dependent Claim
24 words
The device of claim 9, wherein said first and second chips are adjacent at a side and are located in substantially the same plane.
Claim 14
Dependent Claim
27 words
The device of claim 9, where said second chip has a domaiN generator thereon which provides the domains for interaction with the domains in said first chip.
Claim 15
Dependent Claim
24 words
The device of claim 11, where said first and second chips have domain collapsers thereon for destroying domains in each chip after interaction therebetween.
Claim 16
Dependent Claim
32 words
The device of claim 9, where said propagation means is comprised of magnetic elements located on said chips, said elements being magnetized by a magnetic field in the plane of said chip.
Claim 17
Independent Claim
153 words
A device for cylindrical magnetic domains, comprising: a first magnetic chip in which first cylindrical domains can be propagated; first propagation means for propagating said domains in said first chip, said propagation means terminating in a domain collapser; a second magnetic chip in which second cylindrical domains can be propagated, said second chip being adjacent said first magnetic chip, there being a boundary between said chips across which said domains cannot propagate; second propagation means for moving said second domains in said second chips, said second propagation means providing two paths for said domains; means for producing a bias magnetic field for stabilizing the domains in said first and second chips; said first and second propagation means moving said first and second domains to positions where said domains can magnetically interact with one another across said boundary, said interaction determining which of two paths said second domains will take in said second chip.
Claim 18
Independent Claim
153 words
A device for cylindrical magnetic domains, comprising: a first magnetic chip in which first cylindrical domains can be propagated; first propagation means for propagating said domains in said first chip, said propagation means terminating in a domain collapser; a second magnetic chip in which second cylindrical domains can be propagated, said second chip being adjacent said first magnetic chip, there being a boundary between said chips across which said domains cannot propagate; second propagation means for moving said second domains in said second chips, said second propagation means providing two paths for said domains; means for producing a bias magnetic field for stabilizing the domains in said first and second chips; said first and second propagation means moving said first and second domains to positions where said domains can magnetically interact with one another across said boundary, said interaction determining which of two paths said second domains will take in said second chip.
Claim 19
Dependent Claim
31 words
The device of claim 14, where said propagation means comprises magnetic elements located on said chips, said elements being magnetized by a propagation magnetic field in the plane of said chips.
Claim 20
Dependent Claim
15 words
The device of claim 14, where said propagation means comprises conductor loops having currents therein.
Claim 21
Dependent Claim
19 words
The device of claim 14, where one of said paths in said second chip terminates in a domain collapser.
Claim 22
Dependent Claim
26 words
The device of claim 14, where said second chip has a domain generator for producing said second domains, said generator being responsive to said propagation field.
Claim 23
Dependent Claim
18 words
The device of claim 14, where said first and second chips are thin films deposited on a substrate.
Claim 24
Dependent Claim
66 words
In an information transfer structure of the type wherein the presence and absence of magnetic bubble domains represent said information, a first and second magnetic chip each made of magnetic material and each supporting magnetic bubble domains therein, said chips being positioned adjacent to one another in substantially the same plane such that the magnetic bubble domains along adjacent edges of said chips will magnetically interact.
Claim 25
Dependent Claim
66 words
In an information transfer structure of the type wherein the presence and absence of magnetic bubble domains represent said information, a first and second magnetic chip each made of magnetic material and each supporting magnetic bubble domains therein, said chips being positioned adjacent to one another in substantially the same plane such that the magnetic bubble domains along adjacent edges of said chips will magnetically interact.
Claim 26
Dependent Claim
16 words
The structure of claim 20, where said chips are thin films grown on a common substrate.
Claim 27
Dependent Claim
20 words
The structure of claim 20, wherein each chip includes means for propagating domains in that chip to said adjacent edges.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |