Patent ID: 7892069
Filing Date: 2011-02-22
Classification: B24B

Abstract:
1. A loading device of chemical mechanical polishing (CMP) equipment for processing semiconductor wafers, including: a loading cup having a cup-like bath; a cup plate installed in the bath; a loading plate supported on the cup plate for absorbing shock and seating a semiconductor wafer; a driving device and a driving shaft horizontally pivoting and vertically moving the loading cup between a platen of a polishing apparatus and a spindle; an arm connecting the loading cup and the driving shaft, wherein at least one through hole is located at one or more mutually corresponding positions of the bath, the cup plate, and the loading plate of the loading cup; at least one probe assembly for optically detecting a polished thickness at a polished point on the wafer in each through hole at the corresponding position of the loading cup; an optical thickness detection device for applying light onto a layer on the semiconductor wafer, detecting reflected wavelengths, and detecting layer thickness of the semiconductor wafer from a change in a physical quantity extracted from a light interference signal resulting from the reflected wavelengths detected, the optical thickness detection device being located at one side of the driving device; and an optical fiber cable connecting each of the probe assemblies and the thickness detection device, disposed in the arm.