Patent ID: 8616771
Filing Date: 2013-12-31
Classification: B29C,B29L,F16C

Abstract:
1. A fluid dynamic bearing device, comprising: a stator; a rotor; a radial bearing portion for holding the stator and the rotor in a radial direction in a non-contact manner by a dynamic pressure action of a fluid that is generated in a radial bearing gap between the stator and the rotor; and a thrust bearing portion for holding the stator and the rotor in a thrust direction in a non-contact manner by a dynamic pressure action of the fluid that is generated in a thrust bearing gap between the stator and the rotor, wherein a part of at least one of the stator and the rotor that faces the thrust bearing gap is formed by injection-molding by using a resin material, and wherein the resin material comprises a liquid crystal polymer as a base resin formulated with, as filler, a PAN-based carbon fiber having a fiber diameter of 6 to 8 μm and an aspect ratio of 10 to 40.