MANUFACTURING METHOD OF DROPLET DISCHARGE HEAD, DROPLET DISCHARGE HEAD, AND IMAGE FORMATION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of a droplet discharge head which shortens a period of an unstable droplet discharge state during actual use while inhibiting increase in the manufacturing cost.SOLUTION: A diaphragm 21 is formed on one surface of a passage formation substrate 20 in which a pressure generating chamber 31 communicating with a nozzle 41 for discharging a liquid is formed. Further, a piezoelectric element 22 formed by a lower electrode film 22a, a pressure volume body 22b, and an upper electrode film 22c is formed on the diaphragm. The pressure generating chamber 31 is formed at the side of the piezoelectric element 22 which is opposite to the side where the passage formation substrate 20 is formed. Then, a voltage for polarization is applied to the piezoelectric element 22 in a state where a pressure is applied to the piezoelectric element 22 toward a center of a space of the pressure generating chamber 31.