Patent Document ID: 10073818
Application ID: 14447692
Patent Flag: 1

Claim One:
1. A data processing apparatus comprising: a processing chamber in which a sample is subjected to an etching process; a measuring device which is configured to obtain data relating to the processing chamber; a first storage which is configured to store the data received by the input/output device; a second storage which is configured to store a data processing program that includes the steps of: calculating, using a double exponential smoothing method in which the data is set as an input value, a first predicted value that is a predicted value of smoothed data and a second predicted value that is a predicted value of a gradient of the smoothed data, as an output value; and calculating, using a double exponential smoothing method in which the second predicted value calculated as the output value is set as input data, a third predicted value that is a predicted value of smoothed data and a fourth predicted value that is a predicted value of a gradient of the smoothed data, as an output value; and a calculation processing apparatus which is configured to perform the data processing under the data processing program; and a controller which is configured to detect a state of the processing chamber or a change in the state of the processing chamber on the basis of the first predicted value calculated by the calculation processing apparatus as a result of a data smoothing process, the second predicted value calculated by the calculation processing apparatus or the third predicted value calculated by the calculation processing apparatus as a result of a first differential process, and the fourth predicted value calculated by the calculation processing apparatus as a result of a second differential process, respectively, wherein the controller is further configured to detect an end point of the etching process based on the detected state or change in state of the processing chamber and to control the processing chamber in accordance with the detected end point.