Patent ID: 6978525

Claim:
A method of manufacturing a lamination-type piezoelectric element which includes a ceramic laminated body, in which ceramic layers and inner electrode layers are alternately laminated on each other, and also includes a pair of outer electrodes respectively joined to a pair of joining faces formed on an outer circumferential face of the ceramic laminated body, the method of manufacturing the lamination-type piezoelectric element comprising: a laminated body forming step of forming the ceramic laminated body; a groove forming step of forming a dent portion coming into contact with an outer circumferential end portion of at least some part of the inner electrode layers by irradiating a laser beam onto at least the joining faces on the outer circumferential face of the ceramic laminated body so as to form an outer circumferential groove portion, the shape of a recess portion of which is formed into a belt-shape, or the shapes of a plurality of recess portions connected with each other of which are formed into a belt-shape; and an embedding step of forming at least one of an insulating portion made of insulating material and a conductive portion made of conductive material in the outer circumferential groove portion, wherein the outer circumference groove portion having at least one protruding portion protruding from the periphery inside the dent portion or having at least one protruding portion protruding from the dent portion, arranged between the dent portions adjacent to each other is formed by adjusting an irradiating condition of the laser beam in the groove forming step, and the dent portion is embedded so as to cover the protruding portion by forming at least one of an insulating portion made of insulating material and a conductive portion made of conductive material into the outer circumferential groove portion in the embedding step.