Method for manufacturing liquid jetting apparatus and liquid jetting apparatus

A method for manufacturing a liquid jetting apparatus;

• wherein the liquid jetting apparatus includes:
• a flow passage formation member in which a pressure chamber is formed to communicate with a nozzle;
• and
• a piezoelectric actuator having;
• a vibration film provided on the flow passage formation member to cover the pressure chamber;
• a piezoelectric film arranged on the vibration film to correspond to the pressure chamber;
• a first electrode arranged on a surface of the piezoelectric film on a side near to the vibration film;
• a second electrode arranged on another surface of the piezoelectric film on a side far from the vibration film;
• a first protective film covering the piezoelectric film;
• a wire connected to the second electrode;
• and
• a second protective film covering the wire;
• wherein the method comprises:
• a first protective film formation step of forming the first protective film on the vibration film to cover the piezoelectric film and the second electrode;
• a wire formation step of forming the wire;
• a second protective film formation step of forming the second protective film to cover the wire in a state of the first protective film covering the piezoelectric film and the second electrode;
• and
• a first removal step of removing a part, of the first protective film, that overlaps with the second electrode, after the second protective film formation step, so that part of the second electrode is exposed.