Compressor with thrust bearing having insular pressure- receiving portions on sliding surface and diamond-like carbon layer on another sliding surface

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.