| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluid bearing motor and its manufacturing method capable of plating with nickel with high accuracy in a short while, capable of improving degrees of same axle and right angle with respect to a bearing and also capable of resisting influences of changes in temperature. SOLUTION: As shown in figure (a), a ring-shaped back yoke 7 is inserted into an inside of a motor hub 6. With improving surface hardness of a sleeve 3 by plating with nickel to cover at least inner circumference plane of the sleeve 3 and the back yoke 7 inserted inside of the hub 6, the back yoke 7 is mounted on the hub 6. As shown in figure (b), the thickness d1 of nickel plating 13a is determined not less than 0.4μm and not more than 2.5μm.
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