| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a laminated piezoelectric element exhibiting excellent long term durability by preventing disconnection due to cracking which occurs on the boundary of a metallization layer and a conductive bonding material layer when driving, and to provide an injector and a fuel injection system equipped therewith. <P>SOLUTION: A laminated piezoelectric element 1 comprises a laminate 7 of a piezoelectric layer 3 and an internal electrode 5, a metallization layer 8 provided on the side surface of the laminate 7 and connected electrically with the internal electrode 5, a conductive bonding material layer 10 provided on the metallization layer 8, and an external electrode 12 bonded to the metallization layer 8 with the conductive bonding material layer 10 interposed therebetween. The conductive bonding material layer 10 is provided with multiple voids so as not to open to the surface on the side in contact with the metallization layer 8. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
