Patent ID: 6342165
Filing Date: 2002-01-29
Classification: H01L

Abstract:
A method for plasma etching a dielectric material, comprising:providing a semiconductor substrate having said dielectric material formed thereover; providing a plasma etch chamber having a roof, a ring, and a chuck; placing said semiconductor substrate within a plasma etch chamber wherein a gas mixture free of CO is introduced; introducing CHF3 into said plasma etch chamber at a flow rate of between about 10 sccm and 40 sccm; introducing CH2F2 into said plasma etch chamber at a flow rate of between about 10 sccm and 40 sccm; maintaining said ring at a temperature of between about 200Â° C. and 250Â° C.; maintaining said roof at a temperature of between about 115Â° C. and 150Â° C.; maintaining said chuck at a temperature of between about âˆ’10Â° C. and 30Â° C. maintaining a pressure within said plasma etch chamber of between 5 mTorr and 65 mTorr; and generating a gas plasma comprising CHF3 and CH2F2 within said plasma etch chamber.