JPS6423419A - Magnetic disk - Google Patents
Magnetic diskInfo
- 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
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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61243937A (en) * | 1985-04-22 | 1986-10-30 | Toshiba Corp | Vertical magnetic recording medium |
-
1987
- 1987-07-20 JP JP62180473A patent/JP2705068B2/en not_active Expired - Lifetime
Patent Citations (1)
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)
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 |