Patent ID: 7084555
Filing Date: 2006-08-01
Classification: H01L

Abstract:
1. A multi-electrode piezoelectric diaphragm structure comprising: a diaphragm; a piezoelectric material located on the diaphragm, defined as having a first area and a second area, the first area of the piezoelectric material poled in a first direction and the second area of the piezoelectric material poled in a second direction, wherein the poled first direction is in a Z-axis of the piezoelectric material and the poled second direction is in a Radial axis of the piezoelectric material; a first electrode positioned in the first area, on a first surface of the piezoelectric material; and a second electrode positioned in the second area, on the first surface, of the piezoelectric material, the first and second electrodes configured to receive or pass voltages; and a third electrode located on a second surface of the piezoelectric material, the third electrode configured to receive or pass voltages, wherein at least one of an (i) application of voltages to the first, second and third electrodes generates electric fields in the piezoelectric material which result in actuation of the piezoelectric material or (ii) application of pressure or strain to the diaphragm generates electric potentials at the first, second and third electrodes.