Patent ID: 7289866
Filing Date: 2007-10-30
Classification: G05B,H01J,H01L,Y02P

Abstract:
1. A plasma processing apparatus for monitoring information on a plasma processing based on a model or for updating an operating condition of the plasma processing based on a change in the information on the plasma processing caused by the model, when performing the plasma processing on an object by setting the operating condition and generating a plasma in an airtight processing vessel, wherein the model is made by performing a multivariate analysis based on measurement data measured by one or more measuring devices, the apparatus comprising: a means for obtaining first measurement data by using the measuring devices while performing the plasma processing by setting a first operating condition; a means for formulating a first model based on the first measurement data by the multivariate analysis; a means for obtaining second measurement data by using the measuring devices while performing the plasma processing by setting a second operating condition; a means for formulating a second model based on the second measurement data by the multivariate analysis; a means for obtaining third measurement data by using the measuring devices while performing the plasma processing by setting a third operating condition; a means for obtaining weight factors by setting the third measurement data as weighted measurement data wherein the weighted measurement data is obtained by multiplying each of the first and the second measurement data by one of the weight factors to produce first and second weighted data and summing the thus produced first and the second weighted data; and a means for formulating a third model for the third operating condition by multiplying each of the first and the second model by said one of the weight factors to produce first and second weighted models, and summing the thus produced first and the second weighted models.