PRODUCTION OF MAGNETIC DISK SUBSTRATE MADE OF TITANIUM

Title:

PRODUCTION OF MAGNETIC DISK SUBSTRATE MADE OF TITANIUM

Document Type and Number:

Japanese Patent JP2500030

Kind Code:

B2

Abstract:

PURPOSE: To produce the magnetic disk substrate made of titanium which can extremely improve a CSS characteristic in spite of ≤0.1μm, for example, 0.075μm floating amt. of a magnetic head and substantially prevents the generation of sticking.
CONSTITUTION: The surface of a titanium plate is anodized, by which the magnetic disk substrate formed with the anodized thin film layer on the surface of the titanium plate is obtd. The surface roughness Rmax of the titanium plate prior to the anodic oxidation treatment is set at ≤0.05μm, the anodic oxidation treatment voltage at 12 to 35V and the current density at the end of the anodic oxidation treatment at ≤5×10-4A/mm2 at this time.

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Inventors:

MORITA KENJI
OKANO YOKO
SAKYAMA TOSHIO
SUENAGA HIROYOSHI
OOMURA MASAKI

Application Number:

JP15168491A

Publication Date:

May 29, 1996

Filing Date:

June 24, 1991

Export Citation:

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Assignee:

NIPPON KOKAN KK

International Classes:

C25D11/26; G11B5/84; (IPC1-7): G11B5/84; C25D11/26

Domestic Patent References:

JP5671821A

Attorney, Agent or Firm:

Takehiko Suzue

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