Patent ID: 8760031
Filing Date: 2014-06-24
Classification: B06B,B81B,B81C,H04R,Y10T

Abstract:
1. An electromechanical transducer comprising: a plurality of elements, each element including: an insulating protective layer formed to cover at least a whole area of a surface of the second electrode and wiring of the second electrode, wherein the vibrating membrane, the supporting unit and the insulating protective layer comprise silicon nitride film, wherein the plurality of elements include a first element and a second element adjacent to each other, wherein there is a region, between the supporting unit of the first element and the supporting unit of the second element, where the insulating protective layer is not formed, and wherein a thickness of the silicon nitride film at the region is thinner than a thickness of the silicon nitride film above the cavity, which corresponds to a combined thickness of the vibrating membrane under the second electrode and the insulating protective layer above the second electrode.