| 摘要 |
<p>A gas dynamic bearing for a spindle motor used in a clean environment, in which the sliding surface of the bearing is composed of ceramics, at least one or more kinds of lubricant selected from perfluoropolyether family having a functional group reactive to ceramics are spread on the bearing surface finished to be 0.3 micron or under in surface roughness Ra at the sliding surface so that a uniform thin film 20 SIMILAR 100 ANGSTROM in thickness having protective and lubricant functions may be formed on the sliding surface. The lubricant is selected from perfluoropolyether containing hydroxyl group, that containing carboxyl group, and that containing ester group, and contains antistatic agent. <IMAGE></p> |
