Patent ID: 6783626
Filing Date: 2004-08-31
Classification: C23C,H01J,H01L

Abstract:
A substrate processing apparatus comprising:a chamber comprising a substrate support to support a substrate, a gas supply to provide a gas into the chamber, a gas energizer to energize the gas, and an exhaust to exhaust the gas; a substrate transport to transport a substrate onto the substrate support in the chamber; a detector adapted to detect a first intensity of a first wavelength of a radiation emission from the energized gas in the chamber and generate a first signal in relation to the first intensity and detect a second intensity of a second wavelength of the radiation emission and generate a second signal in relation to the second intensity; and a controller adapted to (i) receive the first and second signals from the detector, (ii) perform a mathematical operation on the first and second signals to determine a value of a seasoning state of the chamber, and (iii) treat the chamber in relation to the seasoning state value by forming residues on surfaces in the chamber to obtain a predetermined seasoning state of the chamber that reduces substrate to substrate processing variations, by providing instructions to operate one or more of the substrate transport, substrate support, gas supply, gas energizer and exhaust.