ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC RECORDING MEDIUM, SUBSTRATE FOR MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING MEDIUM, HARD DISK DRIVE

ALUMINUM ALLOY SUBSTRATE FOR MAGNETIC RECORDING MEDIUM, SUBSTRATE FOR MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING MEDIUM, HARD DISK DRIVE

What is provided is an aluminum alloy substrate for a magnetic recording medium which has high rigidity and an excellent plating properties. The aluminum alloy substrate for a magnetic recording medium has a constitution in which coarse grains whose average grain size is within a range that exceeds...

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Bibliographische Detailangaben
Hauptverfasser: YOKOYAMA, Sho, YUKIMATSU, Koji, MACHIDA, Hiroyuki
Format: Patent
Sprache:eng
Schlagworte:
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Zusammenfassung:What is provided is an aluminum alloy substrate for a magnetic recording medium which has high rigidity and an excellent plating properties. The aluminum alloy substrate for a magnetic recording medium has a constitution in which coarse grains whose average grain size is within a range that exceeds 2 μm and is less than or equal to 20 μm are dispersed, the average number of coarse grains per area of 0.042 mm2 is 100 or more, and a surface roughness Ra is less than or equal to 0.2 μm.