Patent ID: 6358360
Filing Date: 2002-03-19
Classification: H01L

Abstract:
An apparatus for polishing a substrate, said substrate comprising a surface to be polished, which said surface comprises a metal at least in part and has projecting areas, said apparatus comprising:a polishing pad, a substrate holder for holding the substrate by making the surface to be polished of said substrate abut said polishing pad, a first drive means for driving said substrate holder to revolve, a second drive means for driving said polishing pad to revolve, a supply means for supplying to the surface to be polished of said substrate an etching solution for etching said metal, a temperature control means for controlling a temperature of the substrate arranged in said substrate holder, and a temperature uniforming means arranged in said substrate holder for making the temperature of the substrate uniform comprising a first and second spiral fluid flow paths arranged from the center of rotation of said substrate holder toward the periphery thereof in the form of a double spiral, said first spiral fluid flow path being provided with a first inlet hole disposed at the center from which a fluid is introduced and a first outlet hole disposed at the periphery from which the fluid is removed, said second spiral fluid flow path being provided with a second inlet hole disposed at the periphery from which the fluid is introduced and a second outlet hole disposed at the center from which the fluid is removed, wherein said temperature control means for controlling the temperature of said substrate to make the temperature of the projecting areas higher than the temperature of areas other than said projecting areas, thereby making an etching rate of the projecting areas higher than an etching rate of the areas other than said projecting areas.