Patent ID: 8652343

Claim:
A method for the selective removal of material from the surface of a silicon-containing substrate supported in a container for forming a deepening, comprising the steps of: applying a mask formed from aluminum onto the substrate surface in accordance with a desired selective removal of material from the surface of the substrate, dry-etching the substrate to selectively remove material from the surface of the substrate, and inductively coupling power into the etching medium during dry etching, the inductively coupled power provided by an inductive coupling coil in the form of a cylinder and having a lower edge, the coil disposed between a first capacitor plate within the container and a second capacitor plate within the container, wherein a cavity of a depth of at least 150 μm is generated at an etch rate of at least 2 μm/min, in turn with etching steps passivation steps are included, and keeping the substrate surface at a distance from the lower edge of the inductive coupling coil of at least two times the mean free path length of the plasma atoms, or at a distance of at least 8 cm from the lower edge of the inductive coupling coil.