Patent ID: 6812151
Filing Date: 2004-11-02
Classification: H01J,H01L

Abstract:
An etching method comprising:an etching gas supply step of supplying an etching gas through a gas supply system into a plasma producing chamber; a plasma producing step of producing radicals in the plasma producing chamber by converting the etching gas into a plasma by applying radio frequency power to the etching gas; and an etching step of etching an object to be processed in a reaction chamber, which is connected to the plasma producing chamber and is evacuated, by the radicals flowing from the plasma producing chamber into the reaction chamber; wherein the etching gas is supplied through the gas supply system at an etching gas supply rate of 8.4 sccm or above for a substantial volume of one liter of the reaction chamber, a flow of etchant is provided at a flow rate which produces a flow diverging position with respect to an outer periphery of an object being etched that is substantially at or internal to the outer periphery of the object being etched, the process pressure is about 5 to about 10 mTorr, and wherein the plasma producing step converts the etching gas into a plasma by inductive coupling using an induction coil.