Patent ID: 7306966

Claim:
A method for manufacturing a diaphragm sensor having a semiconductor substrate in which a porous diaphragm layer and a cavity underneath the porous diaphragm layer are produced to form an unsupported structure, the method comprising: doping the semiconductor substrate in a region of the diaphragm layer, the region of the diaphragm layer receiving doping that is different from that of a region of what is to become the cavity; processing semiconductor material of the region of the diaphragm layer so that it becomes porous; and removing or partially removing and rearranging semiconductor material underneath the porous semiconductor material to form the cavity; wherein the doping of the semiconductor material for an edge region and a central region of the porous diaphragm layer is selected in such a way that mesopores are formed in the edge region and one of macropores or mesopores, having a higher porosity compared to the edge region, are formed in the central region.