Patent ID: 7550390
Filing Date: 2009-06-23
Classification: H01L

Abstract:
1. A method for etching a multi-layered structure using a plasma reactor, comprising: depositing a photoresist layer on top of the multi-layered dielectric structure; flowing a first gas mixture into the plasma reactor and exciting the first gas mixture into a plasma capable of etching a first layer of the multi-layered dielectric structure; etching the first layer using the plasma formed using the first gas mixture; releasing an accumulated charge that results from the etching step performed on the first layer by applying a source power of constant magnitude to the plasma reactor before removing the photoresist layer; flowing a second gas mixture into the plasma reactor and exciting the second gas mixture into a plasma capable of etching a second layer of the multi-layered dielectric structure; and etching the second layer using plasma formed using the second gas mixture.