Patent ID: 9337410
Filing Date: 2016-05-10
CPC Classification: H01L

Claim Text:
1. A multilayer piezoelectric element comprising; an element body having a first and second internal electrodes exposure surface comprising a piezoelectric active area, wherein a first internal electrode faces a second internal electrode sandwiching piezoelectric body layer in-between along laminating direction, and a piezoelectric inactive area, wherein the piezoelectric body layer contacts only the first internal electrode or the second internal electrode at one face along laminating direction, or the first internal electrodes face each other or the second internal electrodes face each other sandwiching piezoelectric body layer in-between along laminating direction, an insulating layer which covers the piezoelectric active area of the first and second internal electrodes exposure surface, a resistance layer which is isolated from the piezoelectric active area by the insulating layer, placed at the first and second internal electrodes exposure surface in order to connect at least a part of the first internal electrode in the piezoelectric inactive area and at least a part of the second internal electrode in the piezoelectric inactive area, and has lower electrical resistance value relative to that of the piezoelectric body layer, a first external electrode electrically connected to the first internal electrode, and a second external electrode electrically connected to the second internal electrode.