Patent ID: 6855645

Claim:
A method of forming oxygen-free silicon carbide having a carbon—carbon triple bond, comprising: flowing Ethynyltrimethylsilane (“ETMS”) into a reaction chamber; flowing an inert gas into the reaction chamber, wherein said flowing ETMS and an inert gas into the reaction chamber comprises flowing said ETMS and said inert gas at an inert-gas/ETMS-gas flow rate ratio in a range of about from to 2/1 to 6/1; not flowing into the reaction chamber a substantial amount of an oxidizer, an oxygen-containing doping gas, or any other agent containing an oxygen atom; forming a plasma in the reaction chamber at a temperature in a range of about from 375° C. to 425° C., at a pressure in a range of about 3 Torr to 5 Torr, by applying HF RF power at a frequency in a range of about from 1 MHz to 30 MHz and at a power level in a range of about from 0.1 W/cm 2 to 0.5 W/cm 2 , and by applying LF RF power to said reaction chamber at a frequency in a range of about from 100 kHz to 500 kHz and at a power level in a range of about from 0.1 W/cm 2 to 0.3 W/cm 2 .