Patent ID: 6762129
Filing Date: 2004-07-13
Classification: H01J,H01L

Abstract:
A dry etching method using a dry etching apparatus having a dual power source capable of independently controlling source power for generating a plasma in a chamber and bias power for drawing ions from the plasma into an object to be etched in the chamber, the method comprising the steps of:placing a substrate having a member containing at least silicon exposed thereat in the chamber; introducing a process gas containing at least oxygen into the chamber in which the substrate has been placed; and performing etching with respect to the member by generating a plasma of the process gas with application of the source power and drawing ions from the plasma into the member with application of the bias power, the step of performing etching with respect to the member including the step of generating the plasma by initiating the application of the bias power before oxidization proceeds at a surface of the member.