JPS54143118A - Production of magnetic disk - Google Patents

Production of magnetic disk

Info

Publication number
JPS54143118A
JPS54143118A JP4981678A JP4981678A JPS54143118A JP S54143118 A JPS54143118 A JP S54143118A JP 4981678 A JP4981678 A JP 4981678A JP 4981678 A JP4981678 A JP 4981678A JP S54143118 A JPS54143118 A JP S54143118A
Authority
JP
Japan
Prior art keywords
pigment
foreign substance
magnetic disk
dispersed
error
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
JP4981678A
Other languages
Japanese (ja)
Other versions
JPS582419B2 (en
Inventor
Masaaki Imamura
Fujio Maeda
Katsuji Ichikawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4981678A priority Critical patent/JPS582419B2/en
Publication of JPS54143118A publication Critical patent/JPS54143118A/en
Publication of JPS582419B2 publication Critical patent/JPS582419B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To eliminate the drawbacks due to the foreign substance in a coated film and to provide an error-free disk for high density recording purpose by filtering the undissolved resin before a pigment is dispersed.
CONSTITUTION: An binder additive containing no pigment and a solvent are filtered separately with the use of filters having smaller meshes than the diameters of the pigment and then are mixed with the pigment and dispersed. After the pigment is sufficiently dispersed, the filtration is performed with the use of a filter having a mesh equal to or larger than the diameter of the pigment, and then the application is performed to an aluminum substrate to form a magnetic layer. Then, the setting and characteristic checking operations are performed to provide a magnetic disk. Thus, there is no foreign substance larger than the pigment in the magnetic paint so that the drawback due to the foreign substance in the coated layer thereby to provide an error-free magnetic disk for the high density recording purpose.
COPYRIGHT: (C)1979,JPO&Japio
JP4981678A 1978-04-28 1978-04-28 Magnetic disk manufacturing method Expired JPS582419B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4981678A JPS582419B2 (en) 1978-04-28 1978-04-28 Magnetic disk manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4981678A JPS582419B2 (en) 1978-04-28 1978-04-28 Magnetic disk manufacturing method

Publications (2)

Publication Number Publication Date
JPS54143118A true JPS54143118A (en) 1979-11-08
JPS582419B2 JPS582419B2 (en) 1983-01-17

Family

ID=12841634

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4981678A Expired JPS582419B2 (en) 1978-04-28 1978-04-28 Magnetic disk manufacturing method

Country Status (1)

Country Link
JP (1) JPS582419B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995015556A1 (en) * 1993-12-01 1995-06-08 Tdk Corporation Production method of magnetic recording medium

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995015556A1 (en) * 1993-12-01 1995-06-08 Tdk Corporation Production method of magnetic recording medium
US5510140A (en) * 1993-12-01 1996-04-23 Tdk Corporation Method for preparing magnetic recording medium
EP1246172A1 (en) * 1993-12-01 2002-10-02 TDK Corporation Method for preparing magnetic recording medium
EP1246170A1 (en) * 1993-12-01 2002-10-02 TDK Corporation Method for preparing magnetic recording medium
EP1246171A1 (en) * 1993-12-01 2002-10-02 TDK Corporation Method for preparing magnetic recording medium

Also Published As

Publication number Publication date
JPS582419B2 (en) 1983-01-17

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