Patent ID: 7158848
Filing Date: 2007-01-02
Classification: G05B,Y02P

Abstract:
1. A plasma processing apparatus for processing a sample by using plasma on a lot unit basis, comprising: a plurality of sensors which detect plural kinds of information relating to a processing state of the sample, as monitor data; data selecting means for selecting a detection time range of the monitor data thus detected, which is used for monitoring the plasma processing apparatus; a signal filter which converts the monitor data within the selected detection time range into a converted signal; a processing performance prediction section which predicts a pattern shape of the sample based on the converted signal; a parameter modification quantity calculation section which calculates a correction quantity of a processing parameter, for decreasing a deviation between the predicted pattern shape and a standard value; a storing unit which stores the correction quantity of the processing parameter, and a correction quantity conversion table used to convert the correction quantity of a processing parameter obtained by the parameter modification quantity calculation section when a kind of a next sample of a next lot is different from the sample, thereby to use a converted correction quantity of the processing parameter for a processing of the next sample.