Patent ID: 7389203
Filing Date: 2008-06-17
Classification: H01J,H01L

Abstract:
1. A method of deciding a cause of abnormality in a plasma processing apparatus which performs a plasma processing to an object to be processed in a processing chamber, comprising: an analysis data acquiring step of acquiring analysis data constituted by a plurality of parameters on the basis of detection values obtained in processes for the object from a detector arranged in the plasma processing apparatus; an abnormality deciding step of analyzing the acquired analysis data to decide whether the analysis data is abnormal or not; a degree-of-influence calculating step of calculating degrees of influence on the abnormality of each parameter of the analysis data decided as abnormal data; and a cause-of-abnormality deciding step of deciding whether the analysis data is abnormal or not after removing the influences on the abnormality from the parameter sequentially in the descending order of the degrees of influence of the parameters, and then deciding the parameters from which the influences on the abnormality are removed up to now as parameters which cause the abnormality when it is decided that the analysis data is normal.