Patent ID: 6400485
Filing Date: 2002-06-04
Classification: F16C,H02K

Abstract:
An air-dynamic bearing apparatus comprising:a shaft member comprising a metal material; a small diameter shaft portion integrally formed with a front end portion of the shaft member; a rotating member comprising a metal material and having an attaching hole and being rotatably supported by the small diameter shaft portion; and a dynamic pressure generating member fixed to an end portion of the small diameter shaft portion; wherein a radial dynamic bearing is formed between the small diameter shaft portion and an inner peripheral face of the attaching hole, a first thrust dynamic bearing is formed between one end face of the rotating member and a corresponding face of the shaft member, a second thrust dynamic bearing is formed between other end face of the rotating member and a corresponding face of the dynamic pressure generating member and metal plating layers are provided to respective dynamic faces of the radial dynamic bearing, the first thrust dynamic bearing and the second thrust dynamic bearing.