Ink jet head, method for fabricating the same, and ink jet recording device

摘要

An ink jet head H is downsized by making piezoelectric elements 23, top electrodes 24 provided on surfaces of the piezoelectric elements 23 that are opposite to pressure rooms 3, and bottom electrode 22 provided on other surfaces of the piezoelectric elements 23 that are on the pressure rooms 3 into thin films in piezoelectric actuators 21, a crack covering layer 28 made from an electric insulating material is arranged on the surfaces of the piezoelectric elements 23 that are on the bottom electrode 22 so that the electric insulating material is filled into the cracks 23b in the piezoelectric elements 23, in order to prevent the piezoelectric actuators 21 from malfunctioning due to the cracks 22b, 23b occurring during the film formation of the bottom electrode 22 and piezoelectric elements 23.