Patent ID: 7373832

Claim:
A miniaturized membrane of a shell of a pressure sensor, the shell having an inner upper chamber having an aperture to receive a fluid the pressure of which is to be measured, a lower inner chamber filled with a pressure transmitting medium, wherein the membrane is made of a supporting wall having a central aperture with edges of the aperture, the supporting wall separating but for the central aperture the lower inner chamber from the upper inner chamber, and a cap made of an upper sheet and of a lower sheet, both sheets having a periphery, the lower sheet having a central aperture with edges of said aperture of the lower sheet, the edges of the central apertures of the supporting wall and of the lower sheet respectively being tightly mechanically linked to one another, the periphery of the upper and lower sheet being tightly linked to one another so that an inner volume is present between said upper and lower sheet.