GB1522817A - Creación de Inventos y Patentes con Inteligencia Artificial

GB1522817A – Magnetic bubble domain propagation
– Google Patents

GB1522817A – Magnetic bubble domain propagation
– Google Patents
Magnetic bubble domain propagation

Info

Publication number
GB1522817A

GB1522817A
GB45263/75A
GB4526375A
GB1522817A
GB 1522817 A
GB1522817 A
GB 1522817A
GB 45263/75 A
GB45263/75 A
GB 45263/75A
GB 4526375 A
GB4526375 A
GB 4526375A
GB 1522817 A
GB1522817 A
GB 1522817A
Authority
GB
United Kingdom
Prior art keywords
bubble
field
magnetic
movement
pulsating
Prior art date
1974-12-31
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Expired

Application number
GB45263/75A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

International Business Machines Corp

Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1974-12-31
Filing date
1975-10-31
Publication date
1978-08-31

1975-10-31
Application filed by International Business Machines Corp
filed
Critical
International Business Machines Corp

1978-08-31
Publication of GB1522817A
publication
Critical
patent/GB1522817A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

Classifications

G—PHYSICS

G11—INFORMATION STORAGE

G11C—STATIC STORES

G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers

G11C19/02—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements

G11C19/08—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure

G11C19/0808—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure using magnetic domain propagation

G11C19/0816—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure using magnetic domain propagation using a rotating or alternating coplanar magnetic field

Abstract

1522817 Magnetic storage arrangements INTERNATIONAL BUSINESS MACHINES CORP 31 Oct 1975 [31 Dec 1974] 45263/75 Heading H3B A magnetic bubble domain BD, Fig. 2A, is moved by a pulsating in-plane magnetic field Hx along a path defined either by a permalloy or NiFe magnetic overlay 13 on the bubble supporting layer 10, or by an ion implantation pattern in the layer, the field imparting a forward extension and rearward contraction movement to the bubble. Thus leftward movement 14 is produced by a + Hx field acting in the direction shown, the field reducing the external bubble field 16 on one side of the bubble and augmenting the external field on the opposite side. Continuity of movement is produced by using a sawtooth pulsating field, Figs. 2B and 2C, having different rise and fall times, the positive and negative waveforms shown imparting leftward 14 and rightward 141 bubble movements, respectively. Alternatively the pulsating field may have different positive and negative durations, Fig. 2D, and/or different amplitudes. The path defining overlay may be in the form of individual strips 18A, 18B, Fig. 3, extending between respective bubble generators G1, G2 and magnetoresistive sensors 20A, 20B. In a modification, Fig. 4 (not shown), the paths are formed by ion implantation strip regions. An alternative arrangement is described, Fig. 5B, in which the bubble layer 10 is overlaid by a magnetic strip 32 and an angel fish pattern 34, bubble movement being effected by an in-plane rotating magnetic field which reacts with the angel fish pattern to produce the required bubble expansions and contractions.

GB45263/75A
1974-12-31
1975-10-31
Magnetic bubble domain propagation

Expired

GB1522817A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

US05/537,800

US4007445A
(en)

1974-12-31
1974-12-31
Minimum structure bubble domain propagation

Publications (1)

Publication Number
Publication Date

GB1522817A
true

GB1522817A
(en)

1978-08-31

Family
ID=24144144
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB45263/75A
Expired

GB1522817A
(en)

1974-12-31
1975-10-31
Magnetic bubble domain propagation

Country Status (7)

Country
Link

US
(1)

US4007445A
(en)

JP
(1)

JPS5184532A
(en)

CA
(1)

CA1068402A
(en)

DE
(1)

DE2554462A1
(en)

FR
(1)

FR2296910A1
(en)

GB
(1)

GB1522817A
(en)

IT
(1)

IT1044749B
(en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

NL7907217A
(en)

1979-09-28
1981-03-31
Philips Nv

MAGNETIC BELL DOMAIN STRUCTURE.

SE436306B
(en)

1980-05-14
1984-11-26
Sab Ind Ab

FIBEROPTIC MAGNETIC FIELD SENSOR WHICH USES MAGNETIC BUBBLES

US5837067A
(en)

1995-06-07
1998-11-17
International Business Machines Corporation
Precision fluid head transport

Family Cites Families (5)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US3540019A
(en)

1968-03-04
1970-11-10
Bell Telephone Labor Inc
Single wall domain device

US3602911A
(en)

1969-12-23
1971-08-31
Bell Telephone Labor Inc
Single wall magnetic domain propagation arrangement

US3876994A
(en)

1972-06-22
1975-04-08
Ibm
Planar bias field control of magnetic bubble domain apparatus

US3781833A
(en)

1972-08-29
1973-12-25
Bell Telephone Labor Inc
Single wall magnetic domain generator

US3811120A
(en)

1973-04-05
1974-05-14
Bell Telephone Labor Inc
Magnetic domain propagation arrangement having channels defined by straight line boundaries

1974

1974-12-31
US
US05/537,800
patent/US4007445A/en
not_active
Expired – Lifetime

1975

1975-10-20
CA
CA238,129A
patent/CA1068402A/en
not_active
Expired

1975-10-31
GB
GB45263/75A
patent/GB1522817A/en
not_active
Expired

1975-10-31
IT
IT28865/75A
patent/IT1044749B/en
active

1975-11-07
FR
FR7534736A
patent/FR2296910A1/en
active
Granted

1975-12-04
DE
DE19752554462
patent/DE2554462A1/en
active
Pending

1975-12-05
JP
JP50144089A
patent/JPS5184532A/ja
active
Pending

Also Published As

Publication number
Publication date

US4007445A
(en)

1977-02-08

IT1044749B
(en)

1980-04-21

FR2296910B1
(en)

1977-12-16

JPS5184532A
(en)

1976-07-23

CA1068402A
(en)

1979-12-18

DE2554462A1
(en)

1976-07-08

FR2296910A1
(en)

1976-07-30

Información de contacto