Patent ID: 8714141
Filing Date: 2014-05-06
Classification: H01L

Abstract:
1. A multi-layer piezoelectric element, comprising: a stacked body configured so that piezoelectric layers and internal electrode layers are alternately laminated; an external electrode bonded to a side surface of the stacked body and electrically connected to the internal electrode layers; and a conductive connection member attached to a surface of the external electrode, a surface of the conductive connection member comprising projections and depressions formed repeatedly at least in a stacked direction of the stacked body, the surface of the external electrode comprising projections and depressions formed repeatedly in the stacked direction of the stacked body, a part of the surface of the external electrode which corresponds to one of the projections in the surface of the conductive connection member being one of the depressions, the projections of the conductive connection member being located in an outer surface of the conductive connection member, and the depressions of the external electrode being located in an outer surface of the external electrode.