| 摘要 |
<p>PROBLEM TO BE SOLVED: To enhance reliability while reducing the size and cost by providing a pattern connecting with a printed board in a region other than a region where means for connecting a pressure generating means with a plane other than that provided with the pressure generating means is formed. SOLUTION: Discrete end face terminal on the side of end face not facing each piezoelectric element in each array of piezoelectric elements is connected with discrete lead-out electrode on a substrate 3 through a conduction processing material. Each discrete lead-out electrode and a common electrode are conducted with a connection pattern, i.e., a rear surface discrete electrode pattern 33 and a rear surface common electrode pattern 35, through through-hole electrodes 23, 25, respectively. A printed board, i.e., an FPC, is connected at a connection region (connecting part, contact part) with a flexible print cable FPC and applied with a drive voltage. Consequently, a field is generated in the laminating direction and an elongation is induced in the piezoelectric element in the laminating direction.</p> |
