Patent ID: 7570773
Filing Date: 2009-08-04
Classification: H04R

Abstract:
1. A sound detecting mechanism comprising a pair of electrodes forming a capacitor on a substrate in which one of the electrodes is a back electrode forming perforations therein corresponding to acoustic holes and the other of the electrodes is a diaphragm, wherein the diaphragm is made of at least one of a metal film and a laminated film, the metal film being formed by at least one of sputtering in a low temperature process, vacuum vapor deposition and plating technique, the laminated film being formed of an organic film, a conductive film, or any combination thereof, the back electrode is formed on the substrate, a spacer is formed from part of a sacrificial layer comprising an organic film for determining a distance between the diaphragm and the back electrode, and wherein, the metal film is made of at least one of Si, Al, Ti, Ni, Mo, W, Au and Cu, by using the at least one of the sputtering process and the vacuum vapor deposition, or formed by laminating a plurality of materials selected from the group consisting of Si, Al, Ti, Ni, Mo, W, Au and Cu, thereby constituting the diaphragm.