Patent ID: 9533502
Date: 2017-01-03
CPC Classifications: B41J,H01L

Claim:
1. An electro-mechanical transducer element, comprising: a first electrode formed on a substrate; an electro-mechanical transducer film formed on at least a part of the first electrode; and a second electrode formed on at least a part of the electro-mechanical transducer film, wherein, in at least one cross section of the electro-mechanical transducer film, a film thickness distribution shape is convex to the second electrode side, and wherein the film thickness distribution shape is approximated by Equation 1: y=−ax2+b, wherein x denotes a coordinate position in a direction perpendicular to a film thickness direction with a cross section center of the electro-mechanical transducer film being set to 0 in the cross section, and y denotes a film thickness of the electro-mechanical transducer film at x.