Abstract: A method for manufacturing bearing components of high precision and hardness supporting fluid dynamic-pressure comprises the steps of: (1) selecting at least one rotary component provided with a predetermined surface pattern for supporting a distribution of fluid dynamic-pressure; (2) forming an opaque and hard amorphous diamond (DLC, a-D) film (or nano-crystalline diamond film) on the pivotal surface of the component by physical vapor deposition (PVD). Thereby the pivotal surfaces of the rotary component and the pattern thereon can have excellent hardness, wearing resistance, rotational stailbity and durability under repeated urging of dynamic fluid pressure.

Abstract: A method for producing porous metal with micro-holes comprises the steps of selecting a base material, sintering or smelting, removing the filling material, washing, drying and reduction. The base material is selected from pure metal and alloy powder for sintering or casting. The filling material is fine powder solvable in water or in alkaline solvents. The sintering step further includes steps of mixing and metal powder metallurgy. The casting utilizes high or low waves to fuse the base material particles. A selected solvent removes the filling material in the raw metal bulk produced in the sintering or casting step, and a product of porous metal with micro-holes is formed.