Scroll compressor having an Oldham's ring containing silicon particles

A scroll compressor comprising:

• a fixed scroll having a base plate and a spiral wrap structure formed on the base plate;
• an orbiting scroll having a base plate and a spiral wrap structure formed on the base plate, said orbiting scroll being set in a manner such that the spiral wrap structure of the orbiting scroll is engaged with the spiral wrap structure of the fixed scroll;
• an Oldham's ring of an Oldham's coupling provided between the back surface of the base plate of the orbiting scroll and a frame structure;
• and
• a driving means connected to the back surface of the base plate of the orbiting scroll through a crank shaft, capable of cooperating with the Oldham's ring to cause the orbiting scroll to have a orbital movement,
• wherein the Oldham's ring is so formed that at least its sliding surfaces allowing the back surface of the base plate of the orbiting scroll as well as the frame structure to slide thereon, are formed by a base material and silicon contained in the base material, the surfaces of silicon remaining on said sliding surfaces are formed into flat surfaces, and a ratio of silicon portions formed into flat surfaces to an entire sliding area of the Oldham's ring is in a range of 3% to 20%.