Patent ID: 7148151
Filing Date: 2006-12-12
Classification: H01J,H01L

Abstract:
1. A method for fabricating a semiconductor device using a dry etching apparatus having a dual power source capable of independently controlling source power and bias power, the method comprising the steps of: forming a mask pattern having an opening corresponding to a region to be formed with an isolation on a silicone substrate; placing the silicon substrate formed with the mask pattern in the chamber; introducing a process gas containing at least oxygen into the chamber in which the silicon substrate has been placed; and forming a trench isolation in the silicon substrate by generating a plasma of the process gas with application of the source power, drawing ions from the plasma into the silicon substrate with application of the bias power, and thereby performing etching with respect to the silicon substrate, wherein the step of forming the trench for isolation includes the step of initiating the application of the bias power before initiating the application of the source power, thereby initiating the application of the bias power before oxidization proceeds at an exposed portion of the silicon substrate.