Patent ID: 9597872
Date: 2017-03-21
CPC Classifications: B41J

Claim:
1. A droplet discharge head, comprising: a nozzle to discharge droplets; a substrate including a pressurization chamber communicated with the nozzle; a diaphragm on the substrate; and an electromechanical transducer element on the diaphragm, the electromechanical transducer element including the diaphragm including an SiO the diaphragm having, in a direction of lamination, a thickness of not less than 1 μm and not greater than 3 μm, the diaphragm having a deflection projecting toward the pressurization chamber with no voltage applied to the electromechanical transducer film, a radius of curvature of the deflection in a transverse direction of the diaphragm being in a range of not less than 2000 μm and not greater than 6000 μm, wherein the electromechanical transducer element has a value of not greater than 10 μC/cm where P P P