Patent ID: 7608196
Filing Date: 2009-10-27
Classification: H01L

Abstract:
1. A method for plasma etching a dielectric material, comprising: applying a mask over a dielectric material so as to leave at least one aperture in the mask through which a surface of the dielectric material is exposed; disposing a wafer comprising the dielectric material and the mask in a plasma etch chamber, the plasma etch chamber having a roof over the wafer, a ring around the wafer, and a chuck supporting the wafer; maintaining the roof at a temperature between about 115° C. and about 150° C.; maintaining the ring at a temperature between about 200° C. and about 250° C.; maintaining the chuck at a temperature between about −10° C. and 30° C.; and generating a gas plasma into an area proximate the at least one aperture, the gas plasma consisting of CHF