JPS61156526A - Production of magnetic disk - Google Patents

Production of magnetic disk

Info

Publication number
JPS61156526A
JPS61156526A JP27450784A JP27450784A JPS61156526A JP S61156526 A JPS61156526 A JP S61156526A JP 27450784 A JP27450784 A JP 27450784A JP 27450784 A JP27450784 A JP 27450784A JP S61156526 A JPS61156526 A JP S61156526A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
powder
magnetic
ferrite
film
isotropic
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
JP27450784A
Inventor
Shigeru Fukushima
Toshikatsu Narumi
Tadatoshi Suenaga
Jun Takahashi
Original Assignee
Fujitsu 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

Links

Abstract

PURPOSE: To improve its reproduction output without decreasing the strength of the coated film and without deteriorating the recording density by mixing isotropic magnetic powder into Ba-ferrite powder in a paint for forming the coated film.
CONSTITUTION: Isotropic magnetic powder is mixed into barium-ferrite powder in a paint for forming a coated film in the production of a magnetic film having a barium-ferrite vertical magnetic coated film. Less than 40% (weight), especially 30W40%, Ba-ferrite magnetic powder in the paint is preferably replaced by the isotropic magnetic powder. Consequently, σs of the whole magnetic powder is increased. The Ba-ferrite magnetic powder may be treated with a dispersant. Since the packing density of the isotropic magnetic powder is fairly high and the isotropic magnetic powder has an isotropic characteristic notwithstanding the orienting method, the powder can be used jointly with the Ba-ferrite powder without any hindrance. Consequently, the degree of orientation is not decreased, a decrease in the recording density is not brought about, and the reproduction output can be increased without increasing the content of the magnetic powder in the coated film excessively.
COPYRIGHT: (C)1986,JPO&Japio
JP27450784A 1984-12-28 1984-12-28 Production of magnetic disk Pending JPS61156526A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27450784A JPS61156526A (en) 1984-12-28 1984-12-28 Production of magnetic disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27450784A JPS61156526A (en) 1984-12-28 1984-12-28 Production of magnetic disk

Publications (1)

Publication Number Publication Date
JPS61156526A true true JPS61156526A (en) 1986-07-16

Family

ID=17542657

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27450784A Pending JPS61156526A (en) 1984-12-28 1984-12-28 Production of magnetic disk

Country Status (1)

Country Link
JP (1) JPS61156526A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5504959A (en) * 1994-03-24 1996-04-09 Matsushita Electric Works, Ltd. Electric toothbrush
US5842249A (en) * 1992-10-31 1998-12-01 Sato; Masanori Toothbrush

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59129933A (en) * 1983-01-12 1984-07-26 Hitachi Maxell Ltd Magnetic recording medium

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59129933A (en) * 1983-01-12 1984-07-26 Hitachi Maxell Ltd Magnetic recording medium

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5842249A (en) * 1992-10-31 1998-12-01 Sato; Masanori Toothbrush
US6209164B1 (en) 1992-10-31 2001-04-03 Masanori Sato Toothbrush and electric toothbrush
US6334232B1 (en) 1992-10-31 2002-01-01 Masanori Sato Toothbrush and electric toothbrush
US5504959A (en) * 1994-03-24 1996-04-09 Matsushita Electric Works, Ltd. Electric toothbrush

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