Patent ID: 7061162

Claim:
A laminated piezoelectric element having a ceramic laminate formed by alternately laminating a plurality of piezoelectric layers comprising a piezoelectric material and a plurality of internal electrode layers having electric conductivity, the side surfaces of said ceramic laminate being provided with a first side-surface electrode and a second side-surface electrode, and said internal electrode layers comprising, being alternately arranged, the first internal electrodes conducting to said first side-surface electrode and the second internal electrodes conducting to said second side-surface electrode, in which the side surface of said ceramic laminate provided with said first side-surface electrode is further provided with first recessed groove portions which are the recessed grooves exposing the ends of said second internal electrodes in the bottom portions thereof, and the side surface thereof provided with said second side-surface electrode is further provided with second recessed groove portions which are the recessed grooves exposing the ends of said first internal electrodes in the bottom portions thereof, said first groove portions and said second groove portions are filled with an insulating filler material having electrically insulating property so as to cover the ends of said second internal electrodes and the ends of said first internal electrodes, and said insulating filler material comprises an insulating resin having electrically insulating property and inorganic particles comprising an inorganic material in said insulating resin.