JPS6423419A - Magnetic disk - Google Patents

Magnetic disk

Info

Publication number
JPS6423419A
JPS6423419A JP18047387A JP18047387A JPS6423419A JP S6423419 A JPS6423419 A JP S6423419A JP 18047387 A JP18047387 A JP 18047387A JP 18047387 A JP18047387 A JP 18047387A JP S6423419 A JPS6423419 A JP S6423419A
Authority
JP
Japan
Prior art keywords
ruggedness
average
value
peak
obviated
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
JP18047387A
Other languages
Japanese (ja)
Other versions
JP2705068B2 (en
Inventor
Kyoji Noda
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 JP62180473A priority Critical patent/JP2705068B2/en
Publication of JPS6423419A publication Critical patent/JPS6423419A/en
Application granted granted Critical
Publication of JP2705068B2 publication Critical patent/JP2705068B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To obviate slider adsorption by roughening the surface of a magnetic disk and specifying the Rp/Rv when the value from the average of ruggedness to the max. peak is designated as Rp and the value from the average of the ruggedness to the deepest valley as Rv to 0.3-1.0 and the height from the average line of the ruggedness to the peak of the projecting parts to 100-500Angstrom . CONSTITUTION:An NiP plating layer 2 having 20mum thickness is deposited on an Al alloy substrate 1 having, for example, 3.5 inch diameter and is subjected to lapping and polishing to obtain the substrate confined in the ratio Rp/Rv between the value Rp from the average of the surface ruggedness to the max. peak and the value Rv from the average of the surface ruggedness to the deepest valley to a 0.3-1.0 range and is confined in the height from the average line of the ruggedness to the peak point of the projecting part to a 100-500Angstrom range. Then, the attraction of a magnetic head to the disk is obviated and the generation of the crash of the slider is obviated as well.
JP62180473A 1987-07-20 1987-07-20 Magnetic disk Expired - Lifetime JP2705068B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62180473A JP2705068B2 (en) 1987-07-20 1987-07-20 Magnetic disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62180473A JP2705068B2 (en) 1987-07-20 1987-07-20 Magnetic disk

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP7300884A Division JP2697712B2 (en) 1995-11-20 1995-11-20 Magnetic disk

Publications (2)

Publication Number Publication Date
JPS6423419A true JPS6423419A (en) 1989-01-26
JP2705068B2 JP2705068B2 (en) 1998-01-26

Family

ID=16083835

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62180473A Expired - Lifetime JP2705068B2 (en) 1987-07-20 1987-07-20 Magnetic disk

Country Status (1)

Country Link
JP (1) JP2705068B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02285515A (en) * 1989-04-27 1990-11-22 Hitachi Ltd Magnetic disk and method and apparatus for producing this disk and magnetic disk device
JPH08212541A (en) * 1995-11-20 1996-08-20 Matsushita Electric Ind Co Ltd Magnetic disk
JPH08297834A (en) * 1996-04-26 1996-11-12 Hitachi Ltd Magnetic disk
JPH08297837A (en) * 1996-04-26 1996-11-12 Hitachi Ltd Production of magnetic disk

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61243937A (en) * 1985-04-22 1986-10-30 Toshiba Corp Vertical magnetic recording medium

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61243937A (en) * 1985-04-22 1986-10-30 Toshiba Corp Vertical magnetic recording medium

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02285515A (en) * 1989-04-27 1990-11-22 Hitachi Ltd Magnetic disk and method and apparatus for producing this disk and magnetic disk device
JPH08212541A (en) * 1995-11-20 1996-08-20 Matsushita Electric Ind Co Ltd Magnetic disk
JPH08297834A (en) * 1996-04-26 1996-11-12 Hitachi Ltd Magnetic disk
JPH08297837A (en) * 1996-04-26 1996-11-12 Hitachi Ltd Production of magnetic disk

Also Published As

Publication number Publication date
JP2705068B2 (en) 1998-01-26

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term