JPS57162112A - Magnetic head for vertical magnetic recording and reproduction - Google Patents

Magnetic head for vertical magnetic recording and reproduction

Info

Publication number
JPS57162112A
JPS57162112A JP4680481A JP4680481A JPS57162112A JP S57162112 A JPS57162112 A JP S57162112A JP 4680481 A JP4680481 A JP 4680481A JP 4680481 A JP4680481 A JP 4680481A JP S57162112 A JPS57162112 A JP S57162112A
Authority
JP
Japan
Prior art keywords
magnetic pole
main magnetic
reproduction
main
film
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.)
Granted
Application number
JP4680481A
Other languages
Japanese (ja)
Other versions
JPH0237603B2 (en
Inventor
Morishige Aoyama
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4680481A priority Critical patent/JPS57162112A/en
Publication of JPS57162112A publication Critical patent/JPS57162112A/en
Publication of JPH0237603B2 publication Critical patent/JPH0237603B2/ja
Granted 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
    • G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier

Abstract

PURPOSE:To achieve high-sensitivity and wide-band reproduction by providing a main and an auxiliary magnetic pole each consisting of a thin magnetic film having high magnetic permeability with windings for magnetic variation detection, and decreasing the film thickness of the main magnetic pole toward the tip surfce. CONSTITUTION:A main magnetic pole 11 has double-stage structure wherein the film thickness (t) of a part at a distance (a) from its tip surface is less than the film thickness T of a more inner part. Then, spacing between a medium and the main magnetic pole is denoted as (d), and d/T=0.25, t/T=0.5, and a/T=0.5. In this case reprodcuction characteristics are as shown by a graph 5 in the figure. In the figure, graphs 6 and 7 show recording density characteristics by a conventional main magnetic pole which has not the step structure atop and has film thicknesses T and (t). Consequently, the reproduction characteristics by the main magnetic pole having the step structure atop have high sensitivity corresponding to its overall thickness on a low-recording density side, and high density corresponding to its tip thin thickness on a high-recording-density side.
JP4680481A 1981-03-30 1981-03-30 Magnetic head for vertical magnetic recording and reproduction Granted JPS57162112A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4680481A JPS57162112A (en) 1981-03-30 1981-03-30 Magnetic head for vertical magnetic recording and reproduction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4680481A JPS57162112A (en) 1981-03-30 1981-03-30 Magnetic head for vertical magnetic recording and reproduction

Publications (2)

Publication Number Publication Date
JPS57162112A true JPS57162112A (en) 1982-10-05
JPH0237603B2 JPH0237603B2 (en) 1990-08-27

Family

ID=12757512

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4680481A Granted JPS57162112A (en) 1981-03-30 1981-03-30 Magnetic head for vertical magnetic recording and reproduction

Country Status (1)

Country Link
JP (1) JPS57162112A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4672494A (en) * 1983-09-01 1987-06-09 Matsushita Electric Industrial Co., Ltd. Magnetic head for effecting perpendicular magnetic recording
US7430095B2 (en) * 2003-11-20 2008-09-30 Maxtor Corporation Tapered write pole for reduced skew effect
US7881019B2 (en) * 2006-03-28 2011-02-01 Hitachi Global Storage Technologies Netherlands B.V. Two step corner recess for secondary stray field reduction in a perpendicular magnetic recording head

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52147414A (en) * 1976-06-03 1977-12-07 Fujitsu Ltd Magnetic head
JPS53121608A (en) * 1977-03-31 1978-10-24 Sony Corp Magnetic recording system
JPS5619513A (en) * 1979-07-25 1981-02-24 Matsushita Electric Ind Co Ltd Magnetic head for vertical recording

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52147414A (en) * 1976-06-03 1977-12-07 Fujitsu Ltd Magnetic head
JPS53121608A (en) * 1977-03-31 1978-10-24 Sony Corp Magnetic recording system
JPS5619513A (en) * 1979-07-25 1981-02-24 Matsushita Electric Ind Co Ltd Magnetic head for vertical recording

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4672494A (en) * 1983-09-01 1987-06-09 Matsushita Electric Industrial Co., Ltd. Magnetic head for effecting perpendicular magnetic recording
US7430095B2 (en) * 2003-11-20 2008-09-30 Maxtor Corporation Tapered write pole for reduced skew effect
US7881019B2 (en) * 2006-03-28 2011-02-01 Hitachi Global Storage Technologies Netherlands B.V. Two step corner recess for secondary stray field reduction in a perpendicular magnetic recording head

Also Published As

Publication number Publication date
JPH0237603B2 (en) 1990-08-27

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