SE400403B - Magnethuvud - Google Patents

Magnethuvud

Info

Publication number: SE400403B
Authority: SE; Sweden
Prior art keywords: magnetic head; magnetic; head
Prior art date: 1973-09-20

Application number

SE7411171A

Other languages

English (en)

Other versions

SE7411171L (sv

Inventor

G W Brock

F B Shelledy

S H Smith

A B Wills

Original Assignee

Ibm

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.)

1973-09-20

Filing date

1974-09-04

Publication date

1978-03-20

1974-09-04 Application filed by Ibm filed Critical Ibm

1975-03-21 Publication of SE7411171L publication Critical patent/SE7411171L/sv

1978-03-20 Publication of SE400403B publication Critical patent/SE400403B/sv

Links

Classifications

- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/332—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using thin films

Landscapes

Engineering & Computer Science (AREA)
Manufacturing & Machinery (AREA)
Magnetic Heads (AREA)

SE7411171A 1973-09-20 1974-09-04 Magnethuvud SE400403B (sv)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US399218A US3881190A (en)	1973-09-20	1973-09-20	Shielded magnetoresistive magnetic transducer and method of manufacture thereof

Publications (2)

Publication Number	Publication Date
SE7411171L SE7411171L (sv)	1975-03-21
SE400403B true SE400403B (sv)	1978-03-20

Family

ID=23578641

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
SE7411171A SE400403B (sv)	1973-09-20	1974-09-04	Magnethuvud

Country Status (16)

Country	Link
US (1)	US3881190A (sv)
JP (1)	JPS5610683B2 (sv)
AR (1)	AR207572A1 (sv)
AT (1)	AT346085B (sv)
BE (1)	BE820159A (sv)
BR (1)	BR7407857D0 (sv)
CA (1)	CA1038493A (sv)
CH (1)	CH578818A5 (sv)
DD (1)	DD113648A5 (sv)
DK (1)	DK143957C (sv)
ES (1)	ES430206A1 (sv)
FR (1)	FR2257975B1 (sv)
GB (2)	GB1458539A (sv)
IT (1)	IT1017361B (sv)
SE (1)	SE400403B (sv)
SU (1)	SU610496A3 (sv)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2248566B1 (sv) *	1973-10-23	1976-11-19	Cii
US4151574A (en) *	1974-05-24	1979-04-24	U.S. Philips Corporation	Magnetic head using a magnetic field-sensitive element and method of manufacturing same
GB1518515A (en) *	1974-08-20	1978-07-19	Matsushita Electric Ind Co Ltd	Magnetic heads
US4190871A (en) *	1975-06-13	1980-02-26	U.S. Philips Corporation	Magnetic converter having a magnetoresistive element
US4044392A (en) *	1975-08-14	1977-08-23	International Business Machines Corporation	Process for making a read-while-write tape head and the product made thereby
US4036723A (en) *	1975-08-21	1977-07-19	International Business Machines Corporation	RF bias sputtering method for producing insulating films free of surface irregularities
US3979775A (en) *	1975-09-08	1976-09-07	International Business Machines Corporation	Magnetoresistive multitransducer assembly with compensation elements for thermal drift and bias balancing
JPS52117609A (en) *	1976-03-29	1977-10-03	Fujitsu Ltd	Magnetic head
NL7611521A (nl) *	1976-10-19	1978-04-21	Philips Nv	Magnetoweerstand leeskop.
JPS53126618U (sv) *	1977-03-14	1978-10-07
US4195323A (en) *	1977-09-02	1980-03-25	Magnex Corporation	Thin film magnetic recording heads
JPS5489613A (en) *	1977-12-27	1979-07-16	Toshiba Corp	Magnetic recording information reproducer
JPS5517853A (en) *	1978-07-21	1980-02-07	Matsushita Electric Ind Co Ltd	Magnetresistance effect head
JPS5567935A (en) *	1978-11-13	1980-05-22	Nec Corp	Magnetic resistance effect head
DE3014459A1 (de) *	1980-04-15	1981-10-22	Siemens AG, 1000 Berlin und 8000 München	Abgeschirmter magnetoresistiver sensor zum abtasten von informationsspuren eines magnetischen aufzeichungstraegers
FR2493015A1 (fr) *	1980-10-29	1982-04-30	Cii Honeywell Bull	Transducteur magnetoresistant
JPS57109121A (en) *	1980-12-26	1982-07-07	Sony Corp	Magnetic resistance effect type magnetic head
JPS58100214A (ja) *	1981-12-10	1983-06-14	Matsushita Electric Ind Co Ltd	薄膜磁気ヘツド
NL8201846A (nl) *	1982-05-06	1983-12-01	Philips Nv	Sensor met een magneetveldgevoelig element en werkwijze voor het vervaardigen daarvan.
DE3390321T1 (de) *	1982-11-11	1985-01-24	Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka	Dünnfilm-Magnetkopf
US4566050A (en) *	1982-12-30	1986-01-21	International Business Machines Corp. (Ibm)	Skew insensitive magnetic read head
NL8301188A (nl) *	1983-04-05	1984-11-01	Philips Nv	Magneetkop met een dunne strook magnetoweerstandmateriaal als leeselement.
EP0262925A3 (en) *	1986-09-29	1989-07-26	Hewlett-Packard Company	Transducer shield
US5159511A (en) *	1987-04-01	1992-10-27	Digital Equipment Corporation	Biasing conductor for MR head
US5075956A (en) *	1988-03-16	1991-12-31	Digital Equipment Corporation	Method of making recording heads with side shields
US4899240A (en) *	1988-07-28	1990-02-06	Eastman Kodak Company	Biasing for a UMR head
US4903158A (en) *	1988-07-28	1990-02-20	Eastman Kodak Company	MR head with complementary easy axis permanent magnet
US5218497A (en) *	1988-12-02	1993-06-08	Hitachi, Ltd.	Magnetic recording-reproducing apparatus and magnetoresistive head having two or more magnetoresistive films for use therewith
US5311385A (en) *	1991-12-18	1994-05-10	Minnesota Mining And Manufacturing Company	Magnetoresistive head with integrated bias and magnetic shield layer
US5331493A (en) *	1992-08-21	1994-07-19	Minnesota Mining And Manufacturing Company	Bidirectional thin-film magnetoresistive tape head assembly
US5790341A (en) *	1995-09-20	1998-08-04	International Business Machines Corporation	Method and apparatus for reducing servo interference in a magneto-resistive head using skew between head and servo pattern
US5923502A (en) *	1995-12-21	1999-07-13	International Business Machines Corporation	Magneto-resistive head including a selectively placed low-reluctance path between shields
US5959812A (en) *	1997-07-25	1999-09-28	Imation Corp.	Fringe field compensation system for multi-track servo recording head
US6611398B1 (en) *	1999-08-09	2003-08-26	Quantum Corporation	Tape head with support bars
US6807032B1 (en)	2000-02-04	2004-10-19	Seagate Technology Llc	Magnetic read head wherein the shields are used as electrical leads and have a minimized anisotropic magneto-resistance effect
US6424496B1 (en) *	2000-06-14	2002-07-23	Quantum Corporation	Variable width flat tape head for bi-directional contact recording and method for making the same
US6654209B2 (en)	2001-01-10	2003-11-25	Seagate Technology Llc	Low resistance lead structure for a low resistance magnetic read head
JP2005251342A (ja) *	2004-03-08	2005-09-15	Tdk Corp	磁気ヘッド、ヘッドサスペンションアセンブリ及び磁気ディスク装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3260980A (en) *		1966-07-12		Semiconductor device op low thermoelectric error voltage
US2712601A (en) *	1951-06-09	1955-07-05	Voltohm Processes Ltd	Mechanical-electrical transducer
US3493694A (en) *	1966-01-19	1970-02-03	Ampex	Magnetoresistive head
FR2018239A1 (sv) *	1968-09-17	1970-05-29	Pioneer Electronic Corp
US3731007A (en) *	1971-04-19	1973-05-01	Denki Onkyo Co Ltd	Magnetic head having a magneto-resistive bridge circuit
US3716781A (en) *	1971-10-26	1973-02-13	Ibm	Magnetoresistive sensing device for detection of magnetic fields having a shape anisotropy field and uniaxial anisotropy field which are perpendicular
JPS5936330B2 (ja) *	1972-08-30	1984-09-03	松下電器産業株式会社	磁気ヘツド

1973
- 1973-09-20 US US399218A patent/US3881190A/en not_active Expired - Lifetime
1974
- 1974-01-01 AR AR255656A patent/AR207572A1/es active
- 1974-07-08 AT AT561474A patent/AT346085B/de active
- 1974-07-23 IT IT25456/74A patent/IT1017361B/it active
- 1974-08-02 FR FR7427489A patent/FR2257975B1/fr not_active Expired
- 1974-08-02 CA CA206,207A patent/CA1038493A/en not_active Expired
- 1974-08-13 JP JP9204174A patent/JPS5610683B2/ja not_active Expired
- 1974-08-28 CH CH1170674A patent/CH578818A5/xx not_active IP Right Cessation
- 1974-09-04 SE SE7411171A patent/SE400403B/sv not_active IP Right Cessation
- 1974-09-12 SU SU742058710A patent/SU610496A3/ru active
- 1974-09-18 GB GB4059574A patent/GB1458539A/en not_active Expired
- 1974-09-18 GB GB2137276A patent/GB1458540A/en not_active Expired
- 1974-09-18 DD DD181174A patent/DD113648A5/xx unknown
- 1974-09-19 DK DK494474A patent/DK143957C/da not_active IP Right Cessation
- 1974-09-19 ES ES430206A patent/ES430206A1/es not_active Expired
- 1974-09-20 BE BE148741A patent/BE820159A/xx not_active IP Right Cessation
- 1974-09-20 BR BR7857/74A patent/BR7407857D0/pt unknown

Also Published As

Publication number	Publication date
DD113648A5 (sv)	1975-06-12
GB1458539A (en)	1976-12-15
DE2432259B2 (de)	1977-06-02
AR207572A1 (es)	1976-10-15
US3881190A (en)	1975-04-29
DK494474A (sv)	1975-06-02
BR7407857D0 (pt)	1975-07-29
AT346085B (de)	1978-10-25
FR2257975B1 (sv)	1976-10-22
DK143957B (da)	1981-11-02
JPS5610683B2 (sv)	1981-03-10
SU610496A3 (ru)	1978-06-05
JPS5059023A (sv)	1975-05-22
BE820159A (fr)	1975-01-16
DE2432259A1 (de)	1975-04-10
CH578818A5 (sv)	1976-08-13
SE7411171L (sv)	1975-03-21
ES430206A1 (es)	1976-10-16
ATA561474A (de)	1978-02-15
GB1458540A (en)	1976-12-15
DK143957C (da)	1982-04-19
CA1038493A (en)	1978-09-12
IT1017361B (it)	1977-07-20
FR2257975A1 (sv)	1975-08-08

Legal Events

Date

Code

Title

Description

1995-01-31

NUG

Patent has lapsed

Ref document number: 7411171-7

Effective date: 19940410

Format of ref document f/p: F

Publication	Publication Date	Title
SE396253B (sv)	1977-09-12	Magnethuvud
SE400404B (sv)	1978-03-20	Magnethuvud
SE400403B (sv)	1978-03-20	Magnethuvud
SE401284B (sv)	1978-04-24	Magnetoresistivt magnethuvud
DK133758C (da)	1976-11-29	Magnetventil
IT991645B (it)	1975-08-30	Testina magnetica
SE400402B (sv)	1978-03-20	Magnethuvud
AT334993B (de)	1977-02-10	Magnetwicklungsdraht
IT1018850B (it)	1977-10-20	Bussola magnetica
AT345595B (de)	1978-09-25	Magnetkopftragarm
NL7414800A (nl)	1975-06-19	Magnetische omzetkop.
AT344423B (de)	1978-07-25	Magnetische einrichtung
IT1022571B (it)	1978-04-20	Testina magnetica di cancellazione
ATA648374A (de)	1977-07-15	Flussmittel
AT354761B (de)	1979-01-25	Magnetband
NL168982C (nl)	1982-05-17	Slijtage-arme magneetkop.
AT336912B (de)	1977-06-10	Mehrkanalmagnetkopf
IT1030640B (it)	1979-04-10	Testina magnetica di cancellazione
IT1024353B (it)	1978-06-20	Testata di chiusura
BE812019A (fr)	1974-09-09	Bobines
SU493793A1 (ru)	1975-11-28	Магнитна головка
AT350288B (de)	1979-05-25	Magnetkopf
SU470856A1 (ru)	1975-05-15	Блок магнитных головок
SU472317A1 (ru)	1975-05-30	Магнитный феррометр
SU493792A1 (ru)	1975-11-28	Магнитна головка