Patent ID: 8287750
Filing Date: 2012-10-16
Classification: H01J,H01L

Abstract:
1. A plasma processing method, comprising the following sequential steps of: making a first plasma by supplying a first high frequency power in a processing chamber from a high frequency power supply; applying a DC voltage to an electrostatic chuck to attract and hold a substrate to be processed while the first plasma acts on the substrate; performing the plasma process on the substrate by making a second plasma act on the substrate by supplying a second high frequency power in the processing chamber from the high frequency power supply; making a third plasma by supplying a third high frequency power supply in the processing chamber from the high frequency power supply; stopping applying the DC voltage while the third plasma acts on the substrate; and extinguishing the third plasma, wherein the first and the third plasma are weaker than the second plasma, wherein the first high frequency power and the third high frequency power are greater than zero and lower than the second high frequency power, and wherein the sequential steps from said making the first plasma to said extinguishing the third plasma are carried out in a single etching process performing an etching on the substrate.