Patent ID: 8592319
Filing Date: 2013-11-26
Classification: H01J

Abstract:
1. A substrate processing method for performing an etching process on a substrate by using plasma in a substrate processing apparatus, the substrate processing apparatus comprising an accommodating chamber which accommodates the substrate, a lower electrode which is disposed inside the accommodating chamber and on which the substrate is held, an upper electrode which faces the lower electrode, a high frequency power source which is connected to the lower electrode, a processing space between the upper electrode and the lower electrode, and a ground which is electrically connected to the upper electrode, one of the upper electrode and the lower electrode being moveable with respect to the other, and the substrate processing method comprising: dividing a potential difference between plasma generated in the processing space and the ground into a potential difference between the plasma and a dielectric and a potential difference between the dielectric and the ground, by the dielectric buried in at least a portion of the upper electrode; performing a first process on the substrate while an interval between the upper electrode and the lower electrode is maintained to a first distance; changing an etching rate by changing the interval to a second distance after the first process; and performing a second process on the substrate by using the changed etching rate while maintain the interval to the second distance.