Abstract: A capacitive pressure transducer comprising a pair of disc shaped members having planar surfaces made from an insulator material, one of the members being several times thinner than the other plate and flexible and constituting a diaphragm and the other thicker plate constituting a stationary plate. A thin conductive film is formed on the surface of each of the members to form the plates of the capacitor. A glass frit is applied on the marginal edge of each member and when the members are held in adjacent relationship, the assembly is fired to seal the two members together while spacing them a predetermined distance apart so that the two conductive plates are opposite each other and are separated by an open gap of a predetermined distance, the two conductive plates being insulated one from the other. Leads are electrically connected to the conductive plate of each disc through the fused glass frit.

Abstract: An electrode for use in capacitive pressure transducers of the type including either a single diaphragm electrode and a conductive reference plate separated by a gap or two diaphragm electrodes separated by a gap. The electrode comprises a conductive area having a plurality of nonconductive areas in the conductive area arranged and configured such that the capacitive fringe effects of the nonconductive areas substantially reduces the nonlinear component of the variation in the capacitance of the capacitive pressure transducer as a function of pressure.