| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic disk capable of preventing the occurrence of impediments of fly-stiction, corrosion and the like even when a magnetic head is made to float at a low floating height of 10 nm or below, suitable for a magnetic disk device of a load/unload system and having high reliability. SOLUTION: The magnetic disk is provided with a magnetic layer, a protective layer and a lubricant layer on a substrate. A lubricant which constitutes the lubricant layer contains a compound having a functional group at a terminal of a perfluoropolyether main chain. The ratio (the functional group/the main chain) of the functional group to the main chain on the surface of the lubricant layer on the side opposite to the magnetic head is 81% or below in a detection ratio measured by a time-of-flight secondary ion mass spectrometry. COPYRIGHT: (C)2008,JPO&INPIT |
