Patent ID: 6610212
Filing Date: 2003-08-26
Classification: H01L

Abstract:
A method for producing a plasma, comprising:providing a plasma etch chamber having a roof, a ring, and a chuck; introducing a gas mixture free of CO into said plasma etch chamber, said gas mixture comprising CHF3 and CH2F2, wherein introducing said gas mixture free of CO into said plasma etch chamber comprises introducing each of CHF3 and 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 about 5 mTorr or greater; and generating a gas plasma comprising CHF3 and CH2F2 within said plasma etch chamber.