A common electrode and a signal electrode are separately formed on two major faces of each of tabular piezoelectric actuator elements arrayed on a substrate. On a flexible printed circuit board, formed are electric bonding pads, which are to be electrically connected with the substrate of the actuator...http://www.google.co.uk/patents/US20030112298?utm_source=gb-gplus-sharePatent US20030112298 - Lattice array-structured piezoelectric actuator and method for producing the same
