摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laminated piezoelectric element which is stably driven without removing the solder even when continuously driven under high electric field and high pressure for a long period of time, and to provide an injector equipped with the laminated piezoelectric element and a fuel injection system. <P>SOLUTION: A laminated piezoelectric element 1 includes: a laminated body 7 formed by laminating a piezoelectric layer 3 and an internal electrode layer 5; an external electrode 8 joined to a side surface of the laminated body 7 and electrically connected to the internal electrode layer 5; and a lead 9 electrically connected to the external electrode 8 via the solder 10. A plurality of voids 11 are provided inside the solder 10. <P>COPYRIGHT: (C)2012,JPO&INPIT |