Piezoelectric film-type element

A method of operating a piezoelectric film-type element, comprising the steps of:

• providing a piezoelectric film-type element comprising
• a ceramic substrate;
• a piezoelectric operating layer disposed on at least one surface of said ceramic substrate, said piezoelectric operating layer comprising a single piezoelectric layer having first and second electrodes arranged integrally on both sides, in a thickness direction thereof, said first electrode comprising a single electrode layer and said second electrode comprising a plurality of strip electrodes;
• and
• employing at least one of (i) said first and second electrodes, respectively, which have opposite polarity with respect to each other, to operate said piezoelectric operating layer as a first piezoelectric operating means operable via said first and second electrodes and said piezoelectric layer and (ii) individual strip electrodes only of said second electrode, said individual strip electrodes having opposite polarities with respect to each other, to operate said piezoelectric operating layer as a second piezoelectric operating means operable via said piezoelectric layer and said plurality of strip electrodes of said second electrode only, and wherein said first and second piezoelectric operating means are commonly or separately operable.