Verfahren zur Strukturierung einer Siliziumoxid-Schicht

摘要

The invention relates to a method for structuring a silicon oxide layer. According to said method, a substrate comprising a silicon oxide layer with a mask is provided in a plasma reactor. The silicon oxide layer is exposed to a plasma which is produced from an etching gas containing at least one fluorocarbon compound that is selected from the group consisting of compounds of the empirical formula CxHyFz, wherein x = 1 to 5, y = 0 to 4 and z = 2 to 10. The process is optimised by direct switching between the etching and deposition modes, which is achieved by varying the potential difference between the substrate and the plasma.