Patent ID: 7679151

Claim:
A micromechanical device comprising a region for forming an integrated circuit, comprising: a recess formed in a planar surface of a substrate; a first layer in the recess; and a membrane layer on the first layer, the membrane layer covering a cavity in the first layer and comprising first and second opposing surfaces; and wherein the region for forming the integrated circuit is outside a region in which the membrane layer is formed; wherein the first layer and the cavity are located in the recess; wherein the first surface of the membrane layer faces the cavity; wherein the membrane layer comprises a plurality of laterally alternately arranged first and second regions of different semiconductor material compositions, and wherein the plurality of first and second regions extend between the two surfaces of the membrane layer; and wherein the first regions are channel-shaped and comprise a higher concentration of a nitrite, nitride or an oxide of the semiconductor material than the second region.