Patent ID: 6626185
Filing Date: 2003-09-30
Classification: C23C,H01J,Y10S

Abstract:
A method of depositing a silicon containing layer on a semiconductor substrate, comprising:(a) transferring a semiconductor substrate into a CVD chamber; (b) depositing a silicon containing layer on the semiconductor substrate in the CVD chamber by supplying a process gas to the CVD chamber, the supplying including supplying the process gas to the CVD chamber by an upper gas ring and a cantilevered lower gas ring located between the upper gas ring and the semiconductor substrate, wherein during the depositing of the silicon containing layer the lower gas ring is cooled and silicon containing deposits are formed on interior surfaces of the CVD chamber; (c) removing the semiconductor substrate from the CVD chamber; (d) introducing a cleaning gas comprising a fluorine-based gas into the CVD chamber; (e) forming a high density plasma by exposing the cleaning gas to an inductive field generated by an RF antenna coil; and (f) performing a plasma cleaning step by contacting the interior surfaces of the chamber with the high density plasma for a time sufficient to remove the deposits on the interior surfaces.