Patent ID: 7411684
Filing Date: 2008-08-12
Classification: G01B,H01L,Y10T

Abstract:
1. A system comprising: an apparatus for processing a semiconductor wafer which performs a predetermined processing, as to a film on a surface of the semiconductor wafer to be processed disposed on a sample stand within a vacuum chamber, by using plasma generated within the vacuum chamber, the apparatus including: a film thickness measuring apparatus for measuring a film thickness of a member to be processed, including: a differential waveform pattern data base for holding a standard pattern consisting of a time differential value of an interference light for each of multiple wavelengths with respect to a film thickness of a first member to be processed; a unit for measuring an intensity of an interference light for each of multiple wavelengths of a second member to be processed; a unit for obtaining a real pattern consisting of time differential values of measured interference light intensities; and a unit for determining a film thickness by using a pattern of zero-cross points of the differential values of intensities of the received interference light for a second wavelength among the received interference lights of the multiple wavelengths.