Hydrodynamic bearing, hydrodynamic bearing apparatus, fabrication method of hydrodynamic bearing and bearing surface working method

A method of fabricating a hydrodynamic bearing comprising:

• a plating step of forming a low friction metal layer having water repellency constituted by dispersing very small particles realizing the water repellency and low friction performance in a metal base of composite plating including at least one of phosphor and boron in at least one of base members of a rotating member and a fixing member on a face thereof opposed to other thereof by an electroless plating;
• a hardening treatment step of hardening the low friction metal layer by heating the one base member at predetermined hardening heat treatment temperature after the plating step;
• a stress relieving step for relieving stress of the base member by heating at temperature equal to or higher than the hardening heat treatment temperature of the hardening treatment prior to the plating treatment;
• and
• an integrating step of integrating the one and the other in a state in which the low friction metal layer of the one is opposed to the other and a hydrodynamic pressure can be generated between the one and the other.