Patent ID: 7785013

Claim:
A high-accuracy sliding bearing comprising a bearing peripheral part having a sintered metal, a resin layer which is formed by molding of a resin material to a sliding portion of said bearing peripheral part, and a product of a coefficient of linear thermal expansion (unit: 1/° C.) of said resin material and a thickness (unit:μm) of said resin layer is not more than 0.15, wherein said resin layer is formed by molding through tunnel gates, wherein said resin layer has a plurality of grooves on a bearing sliding surface thereof and has gate marks of said tunnel gates on bottoms of said grooves, wherein said grooves includes grooves identified as grooves A where each of said grooves A has said gate mark and also includes grooves identified as grooves B which do not have said gate mark; said grooves being disposed so that a distance between each of said grooves B and one side of the adjacent groove A on said bearing sliding surface and the distance between each of said grooves B and other side of said adjacent groove A are equal to each other, wherein a weld portion is formed in each of said grooves B.