Patent ID: 9282415
Filing Date: 2016-03-08
CPC Classification: B06B,B81B,B81C,H04R,Y10T

Claim Text:
1. A method for manufacturing an electromechanical transducer comprising the steps of: forming a first electrode on a substrate; forming a vibrating membrane on an upper surface of the first electrode so that a gap is formed separating a portion of the vibrating membrane from the first electrode; forming a second electrode and wiring for electrically connecting the second electrode on portions of an upper surface of the vibrating membrane such that the second electrode is positioned above the gap and such that the wiring extends from the second electrode over a peripheral side of the gap to a portion of the vibrating member which is formed directly to the upper surface of the first electrode; forming an insulating protective layer overlapping an upper surface of both the second electrode and an upper surface of the wiring, and further on a portion of the upper surface of the vibrating membrane which is formed directly to the upper surface of the first electrode; and removing at least part of the protective layer formed on the upper surface of the vibrating membrane directly above the gap while leaving the protective layer formed on both the upper surface of the second electrode and the upper surface of the wiring.