LUBRICATING FILM, MAGNETIC DISK AND MAGNETIC HEAD
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United States of America Patent
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Issued Date -
Oct 20, 2011
app pub date -
Nov 19, 2008
filing date -
Nov 19, 2008
priority date (Note) -
Abandoned
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Abstract
A magnetic disk or magnetic head having a lubrication film of a lubricant bonded in a ratio of at least 99% to a protective carbon film on a magnetic disk member, the lubricant containing a perfluoropolyether compound (Q)— or a group of the formula (b) given below—)—, Z is the same as defined above, and m, n, p, q and r are each a real number of 5 to 50.
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