JPS5389706A - Magnetic recording medium and its manufacture - Google Patents

Magnetic recording medium and its manufacture

Info

Publication number
JPS5389706A
JPS5389706A JP465877A JP465877A JPS5389706A JP S5389706 A JPS5389706 A JP S5389706A JP 465877 A JP465877 A JP 465877A JP 465877 A JP465877 A JP 465877A JP S5389706 A JPS5389706 A JP S5389706A
Authority
JP
Japan
Prior art keywords
manufacture
recording medium
magnetic recording
resistance
forming
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
JP465877A
Other languages
Japanese (ja)
Other versions
JPS5734572B2 (en
Inventor
Shiro Kimura
Takeo Ooya
Takuji Nakanishi
Toshitake Sato
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
NTT Inc
Original Assignee
NEC Corp
Nippon Telegraph and Telephone 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 Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP465877A priority Critical patent/JPS5389706A/en
Priority to DE19782801856 priority patent/DE2801856A1/en
Publication of JPS5389706A publication Critical patent/JPS5389706A/en
Publication of JPS5734572B2 publication Critical patent/JPS5734572B2/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
    • G11B5/62—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
    • G11B5/716—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 two or more magnetic layers
    • 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
    • G11B5/708—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 addition of non-magnetic particles to the layer
    • G11B5/7085—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 addition of non-magnetic particles to the layer non-magnetic abrasive particles

Landscapes

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

Abstract

PURPOSE: To contrive improvement of S/N and error characteristic without damaging the resistance to wear and resistance to head-crush, by forming a magnetic layer including magnetic particles on the surface of the substrate, and by forming magnetic underlayer including no or relatively less nonmagnetic particles.
COPYRIGHT: (C)1978,JPO&Japio
JP465877A 1977-01-18 1977-01-18 Magnetic recording medium and its manufacture Granted JPS5389706A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP465877A JPS5389706A (en) 1977-01-18 1977-01-18 Magnetic recording medium and its manufacture
DE19782801856 DE2801856A1 (en) 1977-01-18 1978-01-17 Magnetic recording medium with good signal:noise ratio - has an upper magnetic layer contg. non-magnetic particles, and a lower magnetic layer contg. no or few non-magnetic particles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP465877A JPS5389706A (en) 1977-01-18 1977-01-18 Magnetic recording medium and its manufacture

Publications (2)

Publication Number Publication Date
JPS5389706A true JPS5389706A (en) 1978-08-07
JPS5734572B2 JPS5734572B2 (en) 1982-07-23

Family

ID=11590029

Family Applications (1)

Application Number Title Priority Date Filing Date
JP465877A Granted JPS5389706A (en) 1977-01-18 1977-01-18 Magnetic recording medium and its manufacture

Country Status (2)

Country Link
JP (1) JPS5389706A (en)
DE (1) DE2801856A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093631A (en) * 1983-10-26 1985-05-25 Hitachi Maxell Ltd Magnetic recording medium
JPS6427022A (en) * 1987-04-17 1989-01-30 Fuji Photo Film Co Ltd Magnetic recording medium and its production
JPH03165312A (en) * 1989-11-24 1991-07-17 Konica Corp Magnetic recording medium

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0610873B2 (en) * 1984-02-08 1994-02-09 日立マクセル株式会社 Magnetic disk

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3630910A (en) * 1967-01-12 1971-12-28 Fuji Photo Film Co Ltd Magnetic recording medium
JPS49115510A (en) * 1973-03-07 1974-11-05
JPS49123005A (en) * 1973-03-27 1974-11-25
JPS5086105U (en) * 1973-12-07 1975-07-22

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3630910A (en) * 1967-01-12 1971-12-28 Fuji Photo Film Co Ltd Magnetic recording medium
JPS49115510A (en) * 1973-03-07 1974-11-05
JPS49123005A (en) * 1973-03-27 1974-11-25
JPS5086105U (en) * 1973-12-07 1975-07-22

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093631A (en) * 1983-10-26 1985-05-25 Hitachi Maxell Ltd Magnetic recording medium
JPS6427022A (en) * 1987-04-17 1989-01-30 Fuji Photo Film Co Ltd Magnetic recording medium and its production
JPH03165312A (en) * 1989-11-24 1991-07-17 Konica Corp Magnetic recording medium

Also Published As

Publication number Publication date
JPS5734572B2 (en) 1982-07-23
DE2801856A1 (en) 1978-09-14

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