JPS5613526A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5613526A
JPS5613526A JP8688679A JP8688679A JPS5613526A JP S5613526 A JPS5613526 A JP S5613526A JP 8688679 A JP8688679 A JP 8688679A JP 8688679 A JP8688679 A JP 8688679A JP S5613526 A JPS5613526 A JP S5613526A
Authority
JP
Japan
Prior art keywords
metal powder
ferromagnetic metal
recording medium
chained
magnetic recording
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.)
Pending
Application number
JP8688679A
Other languages
Japanese (ja)
Inventor
Kiyonori Saito
Yoichi Nakayama
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.)
TDK Corp
Original Assignee
TDK 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 TDK Corp filed Critical TDK Corp
Priority to JP8688679A priority Critical patent/JPS5613526A/en
Priority to DE19803025663 priority patent/DE3025663A1/en
Priority to NL8003926A priority patent/NL8003926A/en
Priority to GB8022287A priority patent/GB2054411A/en
Publication of JPS5613526A publication Critical patent/JPS5613526A/en
Pending 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
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material

Landscapes

  • Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)

Abstract

PURPOSE: To provide characteristics suitable for high-density recording by employing double-layer structure that has a lower layer of needle-shaped ferromagnetic metal powder on its base and an upper layer of chained ferromagnetic metal powder.
CONSTITUTION: On a nonmagnetic supporter, a magnetic coating containing needle- shaped ferromagnetic metal powder (of about 200W1,000Å in shorter axis size and about 5W20 in axis ratio) obtained by the dry reduction method is applied. After drying, a magnetic coating containing chained ferromagnetic metal powder (of 150W800Å in grain size and 500W10,000Å in length) obtained by the wet reduction method is applied and dried by heating. Since the magnetic recording medium of double-layer structure obtained in those methods consists of chained particles as its upper layer, it has less noises and excellent S/N and excellent high-density magnetic recording medium characteristics such as less head abrasion can be obtained.
COPYRIGHT: (C)1981,JPO&Japio
JP8688679A 1979-07-11 1979-07-11 Magnetic recording medium Pending JPS5613526A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP8688679A JPS5613526A (en) 1979-07-11 1979-07-11 Magnetic recording medium
DE19803025663 DE3025663A1 (en) 1979-07-11 1980-07-07 MAGNETIC RECORDING CARRIER
NL8003926A NL8003926A (en) 1979-07-11 1980-07-07 MAGNETIC REGISTRATION MEDIUM.
GB8022287A GB2054411A (en) 1979-07-11 1980-07-08 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8688679A JPS5613526A (en) 1979-07-11 1979-07-11 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5613526A true JPS5613526A (en) 1981-02-09

Family

ID=13899307

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8688679A Pending JPS5613526A (en) 1979-07-11 1979-07-11 Magnetic recording medium

Country Status (4)

Country Link
JP (1) JPS5613526A (en)
DE (1) DE3025663A1 (en)
GB (1) GB2054411A (en)
NL (1) NL8003926A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57143735A (en) * 1981-02-27 1982-09-06 Hitachi Maxell Ltd Magnetic recording medium
JPS57143734A (en) * 1981-02-27 1982-09-06 Hitachi Maxell Ltd Magnetic recording medium
JPS5832233A (en) * 1981-08-21 1983-02-25 Hitachi Ltd Magnetic recording medium
JPS5864634A (en) * 1981-10-13 1983-04-18 Hitachi Maxell Ltd Magnetic recording medium
JPS58212805A (en) * 1982-04-23 1983-12-10 ゼネラル・エレクトリツク・カンパニイ Method of controlling taper of edge of workpiece by metal rolling mill

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5230818A (en) * 1991-12-20 1993-07-27 Eastman Kodak Company Coating compositions for master media for anhysteretic recording
CN1290120C (en) * 2001-08-22 2006-12-13 住友电气工业株式会社 Conductive paste and conductive film using it, plating method and production method for fine metal component

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57143735A (en) * 1981-02-27 1982-09-06 Hitachi Maxell Ltd Magnetic recording medium
JPS57143734A (en) * 1981-02-27 1982-09-06 Hitachi Maxell Ltd Magnetic recording medium
JPH0353689B2 (en) * 1981-02-27 1991-08-15 Hitachi Maxell
JPS5832233A (en) * 1981-08-21 1983-02-25 Hitachi Ltd Magnetic recording medium
JPH0253850B2 (en) * 1981-08-21 1990-11-20 Hitachi Ltd
JPS5864634A (en) * 1981-10-13 1983-04-18 Hitachi Maxell Ltd Magnetic recording medium
JPH0353690B2 (en) * 1981-10-13 1991-08-15 Hitachi Maxell
JPS58212805A (en) * 1982-04-23 1983-12-10 ゼネラル・エレクトリツク・カンパニイ Method of controlling taper of edge of workpiece by metal rolling mill
JPH0555204B2 (en) * 1982-04-23 1993-08-16 Gen Electric

Also Published As

Publication number Publication date
GB2054411A (en) 1981-02-18
NL8003926A (en) 1981-01-13
DE3025663A1 (en) 1981-02-12

Similar Documents

Publication Publication Date Title
JPS57195329A (en) Magnetic recording medium
JPS57154618A (en) Magnetic recording medium
JPS5217696A (en) Manufacturing process of ferromagnetic grit
EP0529543A3 (en) Magnetic recording medium manufacturing method
JPS56130835A (en) Manufacture for magnetic recording medium
JPS525497A (en) Ferromagnetic grit manufacturing process
JPS5613526A (en) Magnetic recording medium
JPS57183624A (en) Magnetic recording medium
JPS56117336A (en) Manufacture of magnetic recording medium
JPS5613519A (en) Magnetic recording medium
JPS51144604A (en) Magnetic recorder process
JPS55125538A (en) Magnetic recording medium
JPS5584041A (en) Magnetic recording medium
JPS5613516A (en) Magnetic recording medium
JPS5671822A (en) Magnetic recording medium
JPS5584036A (en) Manufacture of magnetic recording medium
JPS5584035A (en) Manufacture of magnetic recording medium
JPS5584037A (en) Magnetic recording medium
JPS5389706A (en) Magnetic recording medium and its manufacture
JPS57158028A (en) High density magnetic recording medium
JPS53115696A (en) Method for producing iron oxide powder
JPS5625905A (en) Ferromagnetic powder and its preparation
JPS54148504A (en) Magnetic recording medium
JPS53104204A (en) Magnetic recording medium and its manufacture
JPS55150133A (en) Magnetic recording body