Patent ID: 7563379
Filing Date: 2009-07-21
Classification: B81C,B82Y,G02B,H01J,H01L

Abstract:
1. A dry etching method for processing a recess in a substrate that comprises: selecting at least one first gas from gases of a first group of atomic species or molecular species; selecting at least one second gas from gases of a second group of atomic species or molecular species; forming first clusters by agglomeration of constituent atoms or molecules of the selected at least one first gas; forming a beam of the first clusters; forming second clusters by agglomeration of constituent atoms or molecules of the selected at least one second gas; forming a beam of the second clusters concurrently with and independently of the forming of the beam of first clusters; forming a beam of mixed first cluster ions and second cluster ions by ionizing the beam of first cluster ions and the beam of second cluster ions concurrently; and accelerating and irradiating the beam of mixed first cluster ions and second cluster ions onto the substrate to form the recess in the substrate with a sidewall and a bottom surface.