JPS6455732A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS6455732A
JPS6455732A JP21197887A JP21197887A JPS6455732A JP S6455732 A JPS6455732 A JP S6455732A JP 21197887 A JP21197887 A JP 21197887A JP 21197887 A JP21197887 A JP 21197887A JP S6455732 A JPS6455732 A JP S6455732A
Authority
JP
Japan
Prior art keywords
magnetic layer
powder
ratio
org
dispersing
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
JP21197887A
Other languages
Japanese (ja)
Other versions
JPH0770048B2 (en
Inventor
Nobuyuki Aoki
Masaki Aoki
Hideaki Komoda
Keiichi Ochiai
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP21197887A priority Critical patent/JPH0770048B2/en
Publication of JPS6455732A publication Critical patent/JPS6455732A/en
Publication of JPH0770048B2 publication Critical patent/JPH0770048B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To attain a higher density and higher output by forming an under coating magnetic layer and top coating magnetic layer formed by dispersing hexagonal crystal type ferrite planar powder having specific shapes into org. binders on a substrate. CONSTITUTION:The under coating magnetic layer formed by dispersing the hexagonal crystal type ferrite planar powder having <=10 ratio of grain size and thickness together with the org. binder and coating the mixture is formed on the substrate and the top coating magnetic layer which is formed by dispersing and coating the hexagonal crystal type ferrite planar powder having >=15 ratio of the grain size and thickness together with the org. binder and is so oriented as to parallel the plate plane with the magnetic layer are is formed thereon. The hexagonal ferrite powder having the larger platy ratio is preferably incorporated into the shallow layer of the magnetic layers and the hexagonal ferrite powder having the smaller platy ratio into the deep layer. The grain size of the ferrite powder particles is preferably 0.05-0.3mum in order to improve C/N. In addition, the axis of easy magnetization is perpendicular to the surface and the coercive force is 300-800 ersted.
JP21197887A 1987-08-26 1987-08-26 Magnetic recording medium Expired - Lifetime JPH0770048B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21197887A JPH0770048B2 (en) 1987-08-26 1987-08-26 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21197887A JPH0770048B2 (en) 1987-08-26 1987-08-26 Magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS6455732A true JPS6455732A (en) 1989-03-02
JPH0770048B2 JPH0770048B2 (en) 1995-07-31

Family

ID=16614859

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21197887A Expired - Lifetime JPH0770048B2 (en) 1987-08-26 1987-08-26 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPH0770048B2 (en)

Also Published As

Publication number Publication date
JPH0770048B2 (en) 1995-07-31

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