Patent ID: 8007262

Claim:
A compressor comprising a thrust bearing including a first sliding surface and a second sliding surface in opposed relation to the first sliding surface, wherein the first sliding surface is formed with a plurality of insular pressure-receiving portions surrounded by grooves and independent of each other, and the second sliding surface is flat as compared with the first sliding surface, wherein the second sliding surface is formed with a diamond-like carbon layer, and wherein the pressure-receiving portions comprise a sagged portion along a peripheral edge which is produced by revolving the first sliding surface with respect to the second sliding surface so that the peripheral edge of the pressure-receiving portions which has high contact pressure is worn, and a height of the peripheral edge in a protruding direction of the pressure-receiving portions from the grooves becomes lower than an inside area of the pressure-receiving portions, wherein the radius of curvature of the peripheral edge of the pressure-receiving portions in a cross section substantially parallel to the protruding direction of the pressure-receiving portions is about zero before revolving the first sliding surface.