Patent ID: 7101458

Claim:
A status monitoring apparatus for monitoring an operating status of a plasma processing apparatus and/or a processing status of an object being processed, based on a result of analyzing light emitted from a plasma generated while the plasma processing apparatus performs a plasma process on the object in a processing chamber, the status monitoring apparatus comprising: a unit configured to obtain an emission spectrum emitted from the plasma when the plasma process is performed on the object; a unit programmed to obtain quantitative data for each of a plurality of emission sources from the obtained emission spectrum by using reference data in a database having stored therein an emission spectrum for each of the emission sources as the reference data, wherein the unit programmed to obtain the quantitative data determines an inner product value between the emission spectrum obtained by the plasma process and the reference data, and sets the inner product value as the quantitative data; and a unit programmed to estimate the operating status of the plasma processing apparatus and/or the processing status of the object being processed, based on changes in the quantitative data for each of the emission sources, wherein the reference data is obtained using an independent component analysis, and the emission spectrum for each of the emission sources correspond to an independent component obtained by the independent component analysis.