Daido Tokushuko Kabushiki Kaisha

Daido Steel Co., Ltd.

Tatsuo Hisada

Shinobu Takagi

Masaki Shinkawa

Yasushi Kaneta

Mikio Ura

Shinichi Yagi

Jun Yatazawa

Narito Shimizu

Naoki Fuse

Makio Kato

An Au plated filmis formed on the surface of a plate-formed metal basecomposed of a metal less noble than Au, and the product is cut along a planned cutting linereflecting a contour of a desired component, to thereby form a separator. Thus-formed separatorhas the Au plated filmformed on the main surfacethereof, and has a cutting planeformed as an end facestretched up to the main surface. The metal baseexposes in a part of the cutting plane, in a width of the exposed region of 1 mm or less. This is successful in providing a metal component for fuel cell which is satisfactory in the corrosion resistance and allows easy fabrication at low costs, a method of manufacturing the same, and also in providing a fuel cell having thus-fabricated metal component for fuel cell.

Metal component for fuel cell and method of manufacturing the same, austenitic stainless steel for polymer electrolyte fuel cell and metal component for fuel cell using the same, polymer electrolyte fuel cell material and method of manufacturing the same, corrosion-resistant conductive component and method of manufacturing the same, and fuel cell

Metal component for fuel cell and method of manufacturing the same, austenitic stainless steel for polymer electrolyte fuel cell and metal component for fuel cell material and method of manufacturing the same, corrosion-resistant conductive component and method of manufacturing the same, and fuel cell

A bearing mechanism eliminates the need for lubricating oil, is capable of generating enough radial dynamic pressure even in lower-speed regions, and yet can be easily surface-machined for the generation of radial dynamic pressure and manufactured with low cost. In at least either one of an outer circumferential surface of a first member or an inner circumferential surface of a second member (hereinafter, referred to as roughened surface), the two circumferential surfaces being opposed to each other with a bearing gap G therebetween, dot-like minute dips and bumps are formed dispersedly, by which the surface is roughened so that its center-line mean roughness is controlled within a range of 0.1 &mgr;m-1.0 &mgr;m. With this arrangement, since enough radial dynamic pressure can be generated at a relatively low rotational speed, time duration of a dynamic-pressure insufficiency upon a start-up or halt of the rotating mechanism is shortened so that members in the bearing part can be made less liable to wear.

Bearing mechanism, hard disk drive mechanism and polygon mirror drive mechanism using the bearing mechanism, and method for manufacturing herringbone groove portions of dynamic-pressure bearing

Growing community of inventors

Nagoya, Japan

Tatsuo Hisada