GB1476489A – Thin film magnetic storage device
– Google Patents
GB1476489A – Thin film magnetic storage device
– Google Patents
Thin film magnetic storage device
Info
Publication number
GB1476489A
GB1476489A
GB3881174A
GB3881174A
GB1476489A
GB 1476489 A
GB1476489 A
GB 1476489A
GB 3881174 A
GB3881174 A
GB 3881174A
GB 3881174 A
GB3881174 A
GB 3881174A
GB 1476489 A
GB1476489 A
GB 1476489A
Authority
GB
United Kingdom
Prior art keywords
layer
channels
domain
coercivity
channel
Prior art date
1973-09-06
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
GB3881174A
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.)
BASF SE
Original Assignee
BASF SE
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.)
1973-09-06
Filing date
1974-09-05
Publication date
1977-06-16
1974-09-05
Application filed by BASF SE
filed
Critical
BASF SE
1977-06-16
Publication of GB1476489A
publication
Critical
patent/GB1476489A/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
G11C19/0841—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 electric current
Abstract
1476489 Magnetic domain devices BASF AG 5 Sept 1974 [6 Sept 1973] 38811/74 Heading H3B A magnetic domain device, e.g. a shift register, has low coercivity strip channels 24 in a high coercivity layer and domain propagating conductors 41, 42 and 61, 62 intersecting the channels at right angles and arranged in staggered fashion as shown in two planes parallel to the layer. The conductors are at least as wide as the channels and are photoetched out of copper coated on both sides of a polyester sheet 50 and are pulsed in a predetermined sequence of polarities to drive domains for electric or optical read-out and electronic recycling. The channel layer is of 64 : 15 : 21 : NiFeCo alloy vapour-deposited on an Al or Ag layer evaporated on a glass, ceramic or metal substrate 10. The Al or Ag is removed by photoetching in the channel locations so that the alloy layer is deposited directly on to the substrate which has a smoother surface than the Al or Ag layer and therefore a lower coercivity. Alternatively an over-layer of ferromagnetic material of high coercivity and possibly spaced from the channels by an SiO layer is exchangecoupled with the domain layer outside the channels to define the channel boundaries, or Cu or Au may be diffused into the domain layer.
GB3881174A
1973-09-06
1974-09-05
Thin film magnetic storage device
Expired
GB1476489A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
DE19732344983
DE2344983A1
(en)
1973-09-06
1973-09-06
MAGNETIC THIN-LAYER STORAGE
Publications (1)
Publication Number
Publication Date
GB1476489A
true
GB1476489A
(en)
1977-06-16
Family
ID=5891834
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3881174A
Expired
GB1476489A
(en)
1973-09-06
1974-09-05
Thin film magnetic storage device
Country Status (6)
Country
Link
US
(1)
US3962690A
(en)
JP
(1)
JPS5718272B2
(en)
DE
(1)
DE2344983A1
(en)
FR
(1)
FR2243491B1
(en)
GB
(1)
GB1476489A
(en)
IT
(1)
IT1019191B
(en)
Families Citing this family (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US5477482A
(en)
*
1993-10-01
1995-12-19
The United States Of America As Represented By The Secretary Of The Navy
Ultra high density, non-volatile ferromagnetic random access memory
US5768183A
(en)
*
1996-09-25
1998-06-16
Motorola, Inc.
Multi-layer magnetic memory cells with improved switching characteristics
US9459835B2
(en)
2014-01-15
2016-10-04
HGST Netherlands B.V.
Random number generator by superparamagnetism
Family Cites Families (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
NL257524A
(en)
*
1959-11-02
US3241126A
(en)
*
1961-05-25
1966-03-15
Hughes Aircraft Co
Magnetic shift register
US3292161A
(en)
*
1962-01-19
1966-12-13
Interstate Electronics Corp
Thin film shift register
FR2123122B1
(en)
*
1971-01-14
1976-03-19
Tech Systemes Informa Iq
1973
1973-09-06
DE
DE19732344983
patent/DE2344983A1/en
not_active
Withdrawn
1974
1974-09-02
JP
JP10000174A
patent/JPS5718272B2/ja
not_active
Expired
1974-09-05
US
US05/503,285
patent/US3962690A/en
not_active
Expired – Lifetime
1974-09-05
GB
GB3881174A
patent/GB1476489A/en
not_active
Expired
1974-09-05
IT
IT52889/74A
patent/IT1019191B/en
active
1974-09-06
FR
FR7430254A
patent/FR2243491B1/fr
not_active
Expired
Also Published As
Publication number
Publication date
JPS5718272B2
(en)
1982-04-15
FR2243491A1
(en)
1975-04-04
IT1019191B
(en)
1977-11-10
FR2243491B1
(en)
1981-08-07
US3962690A
(en)
1976-06-08
DE2344983A1
(en)
1975-03-20
JPS5056831A
(en)
1975-05-17
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Legal Events
Date
Code
Title
Description
1977-10-26
PS
Patent sealed [section 19, patents act 1949]
1984-05-23
PCNP
Patent ceased through non-payment of renewal fee
