GB1344890A - Electromagnetic transducers - Google Patents

Electromagnetic transducers

Info

Publication number
GB1344890A
GB1344890A GB1344890DA GB1344890A GB 1344890 A GB1344890 A GB 1344890A GB 1344890D A GB1344890D A GB 1344890DA GB 1344890 A GB1344890 A GB 1344890A
Authority
GB
United Kingdom
Prior art keywords
edge portions
alternatively
gap
strip
yolk
Prior art date
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
Other languages
English (en)
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.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1344890A publication Critical patent/GB1344890A/en
Expired legal-status Critical Current

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
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G11B5/245—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for controlling the reluctance of the magnetic circuit in a head with single gap, for co-operation with one track
    • G11B5/2452—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for controlling the reluctance of the magnetic circuit in a head with single gap, for co-operation with one track where the dimensions of the effective gap are controlled
    • 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
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • 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
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3109—Details
    • G11B5/313—Disposition of layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)
GB1344890D 1971-08-21 1971-08-21 Electromagnetic transducers Expired GB1344890A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3931671 1971-08-21

Publications (1)

Publication Number Publication Date
GB1344890A true GB1344890A (en) 1974-01-23

Family

ID=10408905

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1344890D Expired GB1344890A (en) 1971-08-21 1971-08-21 Electromagnetic transducers

Country Status (6)

Country Link
JP (1) JPS4830412A (enrdf_load_stackoverflow)
CA (1) CA960356A (enrdf_load_stackoverflow)
DE (1) DE2233453A1 (enrdf_load_stackoverflow)
FR (1) FR2150335B1 (enrdf_load_stackoverflow)
GB (1) GB1344890A (enrdf_load_stackoverflow)
IT (1) IT963420B (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4380784A (en) 1980-04-02 1983-04-19 Compagnie Internationale Pour L'informatique Cii-Honeywell Bull (Societe Anonyme) Magnetic transducer for reading and/or recording of data contained on a magnetic carrier
US4386383A (en) 1980-04-02 1983-05-31 Compagnie Internationale Pour L'informatique Cii-Honeywell Bull (Societe Anonyme) Magnetic transducer comprising a gap of variable larger dimension for reading and writing data present on a magnetic carrier
EP0411914A3 (en) * 1989-08-04 1991-10-16 Matsushita Electric Industrial Co., Ltd. Thin film magnetic head
EP0414473A3 (en) * 1989-08-24 1992-01-08 Matsushita Electric Industrial Co., Ltd. Magnetic head device
EP0411915A3 (en) * 1989-08-04 1992-01-15 Matsushita Electric Industrial Co., Ltd. Thin film magnetic head
WO2001026097A1 (en) * 1999-10-05 2001-04-12 Seagate Technology, Llc Longitudinal magnetic recording heads with variable-length gaps
US6560069B1 (en) 1999-11-29 2003-05-06 Seagate Technology, Llc Perpendicular recording head defining the trackwidth by material deposition thickness
US6693768B1 (en) 2000-03-15 2004-02-17 Seagate Technology Llc Perpendicular magnetic recording head having a flux focusing main pole
US6707642B1 (en) 2000-02-04 2004-03-16 Seagate Technology Llc Longitudinal magnetic recording head with reduced side fringing
US6771462B1 (en) 1999-09-20 2004-08-03 Seagate Technology Llc Perpendicular recording head including concave tip
US6865056B1 (en) 1999-10-05 2005-03-08 Seagate Technology Llc Longitudinal magnetic recording heads with variable-length gaps
US6898053B1 (en) 1999-10-26 2005-05-24 Seagate Technology Llc Perpendicular recording head with trackwidth defined by plating thickness

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2489570A1 (fr) 1980-08-27 1982-03-05 Cii Honeywell Bull Transducteur magnetique integre
CA1189969A (en) * 1982-05-26 1985-07-02 Gilbert D. Springer Differential-permeability field-concentrating magnetic writing head

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2963690A (en) * 1957-10-14 1960-12-06 Ibm Magnetic transducer
US3171107A (en) * 1961-07-03 1965-02-23 Ibm Wide-record narrow-read magnetic head

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4380784A (en) 1980-04-02 1983-04-19 Compagnie Internationale Pour L'informatique Cii-Honeywell Bull (Societe Anonyme) Magnetic transducer for reading and/or recording of data contained on a magnetic carrier
US4386383A (en) 1980-04-02 1983-05-31 Compagnie Internationale Pour L'informatique Cii-Honeywell Bull (Societe Anonyme) Magnetic transducer comprising a gap of variable larger dimension for reading and writing data present on a magnetic carrier
EP0411914A3 (en) * 1989-08-04 1991-10-16 Matsushita Electric Industrial Co., Ltd. Thin film magnetic head
EP0411915A3 (en) * 1989-08-04 1992-01-15 Matsushita Electric Industrial Co., Ltd. Thin film magnetic head
EP0414473A3 (en) * 1989-08-24 1992-01-08 Matsushita Electric Industrial Co., Ltd. Magnetic head device
US6771462B1 (en) 1999-09-20 2004-08-03 Seagate Technology Llc Perpendicular recording head including concave tip
WO2001026097A1 (en) * 1999-10-05 2001-04-12 Seagate Technology, Llc Longitudinal magnetic recording heads with variable-length gaps
US6865056B1 (en) 1999-10-05 2005-03-08 Seagate Technology Llc Longitudinal magnetic recording heads with variable-length gaps
US6898053B1 (en) 1999-10-26 2005-05-24 Seagate Technology Llc Perpendicular recording head with trackwidth defined by plating thickness
US6560069B1 (en) 1999-11-29 2003-05-06 Seagate Technology, Llc Perpendicular recording head defining the trackwidth by material deposition thickness
US6707642B1 (en) 2000-02-04 2004-03-16 Seagate Technology Llc Longitudinal magnetic recording head with reduced side fringing
US6693768B1 (en) 2000-03-15 2004-02-17 Seagate Technology Llc Perpendicular magnetic recording head having a flux focusing main pole

Also Published As

Publication number Publication date
DE2233453A1 (de) 1973-02-22
FR2150335B1 (enrdf_load_stackoverflow) 1978-09-29
FR2150335A1 (enrdf_load_stackoverflow) 1973-04-06
IT963420B (it) 1974-01-10
CA960356A (en) 1974-12-31
JPS4830412A (enrdf_load_stackoverflow) 1973-04-21

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee