Patent ID: 7435691

Claim:
A method for manufacturing a micromechanical component, comprising: providing a silicon substrate; providing an oxidation stop layer on an upper side of the silicon substrate; providing a silicon layer on the oxidation stop layer; forming an oxidation mask on an upper side of the silicon layer; thermally oxidizing the silicon layer using the oxidation mask, the silicon layer changing into a silicon-oxide layer that extends below the oxidation mask and has, below the oxidation mask, a non-oxidized silicon region that is bounded by silicon-oxide wedges pointing to each other; removing the oxidation mask and the non-oxidized silicon region of the silicon layer to expose an opening; interrupting the oxidation stop layer in a region of the opening to expose the silicon substrate; producing a cavity, situated in the silicon substrate, by an etching process, the opening serving as access for an etchant to the silicon substrate; and closing the opening and the cavity by at least one closing layer.