Patent ID: 7348646

Claim:
A micromechanical capacitive converter, comprising: a) a movable membrane; b) a substrate; and c) a carrier layer being arranged between the substrate and the moveable membrane, wherein an electrically conductive face element is arranged on the carrier layer so that a cavity is positioned between the moveable membrane and the electrically conductive face element and the electrically conductive face element faces the moveable membrane via the cavity, wherein the carrier layer and the electrically conductive face element are perforated by perforation openings, wherein the smallest opening width of the perforation openings corresponds to more than double the distance between the membrane and the electrically conductive face element, an opening being formed in the substrate so that a part of a side of the carrier layer that abuts the substrate is exposed so as to allow a fluidic connection between the cavity and the opening via the perforation openings.