Patent ID: 7008109

Claim:
A dynamic pressure bearing device comprising: a dynamic pressure face of a shaft member; a dynamic pressure face of a bearing member; lubricating fluid filled in a bearing space of a dynamic pressure bearing portion including a gap between the dynamic pressure faces; a dynamic pressure generation means for pressing so that the lubricating fluid generates a dynamic pressure that supports the shaft member in a noncontact manner with the bearing member and in a rotatable manner relatively to the bearing member; and a sliding surface layer having abrasion resistance provided to at least one of the dynamic pressure face of the shaft member and the dynamic pressure face of the bearing member; wherein the sliding surface layer is made up of a resin lubricating film in which many particles of solid lubricating material is dispersed, and a maximum diameter of the particles constituting the solid lubricating material included in the sliding surface layer is smaller than a minimum gap size of the bearing space of the dynamic pressure bearing portion.