Patent ID: 6734095
Filing Date: 2004-05-11
Classification: H01L

Abstract:
A method for producing patterned cavities having submicrometer dimensions in a cavity layer of a semiconductor device, comprising the steps of:providing a base layer; applying a process layer to the base layer, the process layer initially being a compact, homogeneous process layer; patterning the process layer for forming ribs having submicrometer dimensions and trenches between the ribs, the ribs being formed of a layer material; filling the trenches with a process liquid; cooling the process liquid to a temperature below its freezing point resulting in a frozen process liquid, and in a process surface having sections formed from uncovered surfaces of the ribs and from a surface of the frozen process liquid; applying a covering layer to the process surface resulting in the formation of cavities in areas where the covering layer covers the trenches; and expelling the process liquid from the cavities, thus completing the formation of the cavity layer from the process layer.