Patent ID: 6277657
Filing Date: 2001-08-21
Classification: C23C,C30B,H01L

Abstract:
An apparatus for fabricating a semiconductor device to be used in removing an oxide film formed on a semiconductor substrate therefrom, the apparatus comprising:a vacuum vessel for accommodating the semiconductor substrate;a substrate heating unit provided additionally in the vacuum vessel to heat the semiconductor substrate in the vacuum vessel;a gas supply unit for supplying a gas having a function of reacting with the oxide film and generating a volatile material within the vacuum vessel;a polarized light analyzing unit for detecting a state of the oxide film on the semiconductor substrate after the removing process based on a signal .DELTA. representing a difference in phase shift between p-polarized light and s-polarized light of polarized measuring light; anda control unit for controlling a condition during the removal of the oxide film on the semiconductor substrate therefrom in accordance with the signal .DELTA. detected by the polarized light analyzing unit.