Multilayered piezoelectric element and method of manufacturing the same

A multilayered piezoelectric element comprising:

• a multilayered structure including plural piezoelectric material layers, at least one first electrode layer, and at least one second electrode layer, said at least one first electrode layer and said at least one second electrode layer alternately stacked with respective one of said piezoelectric material layers in between;
• at least one first insulating film formed of a synthetic resin on an end portion of said at least one first electrode layer in a first region within side surfaces of said multilayered structure;
• and
• at least one second insulating film formed of a synthetic resin on an end portion of said at least one second electrode layer in a second region different from the first region within the side surfaces of said multilayered structure;
• wherein a thickness of each of said first and second insulating films is larger than Ec·HN/E and a ratio of width/thickness thereof is less than 2E/Ec, where HN is a thickness of each of said plural piezoelectric material layers, Ec is a coercive electric field thereof, and E is an electrical withstand voltage of said first and second insulating films.