MAGNETIC DISK COMPRISING FIRST CARBON COATING FILM HAVING HIGH SP3 CONTENT AND SECOND CARBON COATING FILM HAVING LOW SP3 CONTENT

PROBLEM TO BE SOLVED: To provide a method for forming an improved carbon protective coating film without affecting large influence on a antifliction system between a disk and a head in a magnetic disk having the carbon protective coating film and to provide a magnetic disk having the improved carbon...

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Bibliographische Detailangaben
Hauptverfasser:	LAIRSON BRUCE, LIU WEN, YAMASHITA TSUTOMU TOM, HASHIMOTO SHIGETO, TSOI CHING JACKIE, YONG ERIC WOO HOCK
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY PHYSICS SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for forming an improved carbon protective coating film without affecting large influence on a antifliction system between a disk and a head in a magnetic disk having the carbon protective coating film and to provide a magnetic disk having the improved carbon protective coating film. SOLUTION: The method for manufacturing the magnetic disk comprises the formation of a first and a second protective carbon layer on the magnetic disk. The first protective carbon layer comprises SP3 dominant carbon. The second protective carbon layer comprises 50% or less SP3 carbon. The second protective carbon layer has very thin thickness, e.g. 0.1-1.0 nm thickness. A lubricating layer (e.g. perfluoropolyether lubricant) is applied onto the second protective carbon layer. The second protective carbon layer promotes improved cooperation between the disk and the lubricant.