Fluid bearing unit and spindle motor using the same
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United States of America Patent
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Dec 2, 2008
Grant Date -
Jan 12, 2006
app pub date -
Jul 12, 2004
filing date -
Jul 12, 2004
priority date (Note) -
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Abstract
The present invention provides a fluid bearing unit capable of achieving lower torque and lower current consumption in comparison with a conventional bearing unit, and a spindle motor using the same. The present invention employs an ester derived from 1,5-pentanediol having one alkyl side chain and saturated monovalent fatty acid having 5 to 8 carbon atoms as a base oil of a lubricant with which a gap between a shaft and a sleeve is filled.
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