Patent ID: 8530261

Claim:
A method for producing a component having at least one diaphragm formed in an upper surface of the component, which diaphragm spans a cavity, and having at least one access opening from a back side of the component to the cavity, the method comprising: producing at least one first diaphragm layer and the cavity from the upper surface of the component in a monolithic semiconductor substrate; and producing the access opening from the back side of the component in a temporally restricted etching process without an etching stop layer; wherein the access opening is placed in a region in which the substrate material comes up to the first diaphragm layer, and the etching process for producing the access opening includes at least one anisotropic etching step and at least one isotropic etching step, in the anisotropic etching step, an etching channel from the back side of the substrate being produced, which terminates beneath the first diaphragm layer in a vicinity of the cavity, and at least an end region of the etching channel being expanded in the isotropic etching step until the etching channel is connected to the cavity.