Patent ID: 8133349
Filing Date: 2012-03-13
Classification: C23C,H01J,H01L

Abstract:
1. An inductively coupled plasma processing apparatus wherein semiconductor substrates are subjected to plasma etching, comprising: a processing chamber in which a semiconductor substrate is processed; a substrate support on which the semiconductor is supported during processing thereof; a dielectric window forming a wall of the chamber; an antenna operable to inductively couple RF energy into the chamber and energize process gas into plasma in a chamber gap between the substrate support and the dielectric window; a showerhead plate adjacent to or incorporated in the dielectric window, the showerhead plate having gas holes therein in fluid communication with a plenum below or in the dielectric window, the plenum having a gas volume of no greater than 500 cm a gas delivery system operable to alternately supply process gas comprising an etching gas and a deposition gas to the plenum such that the etching gas in the plenum is replaced with the deposition gas within 200 milliseconds or the deposition gas in the plenum is replaced with the etching gas within 200 milliseconds, the plasma processing apparatus being operable to etch openings in silicon material on the semiconductor substrate at a rate of at least 10 μm/minute.