Patent ID: 6346037
Filing Date: 2002-02-12
Classification: B24B,H01L

Abstract:
A wafer polishing machine, comprising:first and second polishing bases each having a polishing cloth attached to the surface thereof and rotating the polishing cloth; first and second wafer holding heads each holding wafers and rotating while pressing the surfaces of the wafers against said polishing cloth; a wafer loading unit on which unpolished wafers are placed; a wafer unloading unit on which polished wafers are placed; a first head rotating mechanism for rotating said first wafer holding head so as to position it above said first polishing base, wafer loading unit, or wafer unloading unit; a second head rotating mechanism for rotating said second wafer holding head so as to position it above said second polishing base, wafer loading unit, or wafer unloading unit; a first transportation mechanism for transporting an unpolished wafer to said wafer loading unit; and a second transportation mechanism for transporting a polished wafer from said wafer unloading unit, wherein the first transportation mechanism and the second transportation mechanism are different, wherein said first and second polishing bases are located mutually adjacently, said wafer loading unit and wafer unloading unit are located mutually adjacently, said first polishing base and wafer loading unit are located diagonally, and said second polishing base and wafer unloading unit are located diagonally.