PERPENDICULAR MAGNETIC RECORDING DISK AND MANUFACTURING METHOD THEREOF

PERPENDICULAR MAGNETIC RECORDING DISK AND MANUFACTURING METHOD THEREOF

A perpendicular magnetic recording disk is produced by forming a soft magnetic layer on a non-magnetic substrate either directly or through a foundation layer in between, forming texturing marks on the surface of this soft magnetic layer, forming a perpendicular magnetic recording layer on the soft...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: TANIFUJI TATSUYA, KUMASAKA NORIYUKI
Format: Patent
Sprache:eng
Schlagworte:
DRESSING OR CONDITIONING OF ABRADING SURFACES
FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
GRINDING
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING
PERFORMING OPERATIONS
PHYSICS
POLISHING
TRANSPORTING
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Beschreibung
Zusammenfassung:A perpendicular magnetic recording disk is produced by forming a soft magnetic layer on a non-magnetic substrate either directly or through a foundation layer in between, forming texturing marks on the surface of this soft magnetic layer, forming a perpendicular magnetic recording layer on the soft magnetic layer either directly or through an intermediate layer in between, and forming a protective layer on the perpendicular recording layer. A texturing process is carried out such that the average surface roughness of the soft magnetic layer is 0.5 Å-5.0 Å, and the line density of the texturing marks is 30 lines/mum or more.