Patent ID: 8946831
Filing Date: 2015-02-03
Classification: B81B,B81C

Abstract:
1. A MEMS microphone comprising: a substrate comprising a plurality of diaphragm suspension points; a backplate; a diaphragm having a top side and an opposing bottom side, the diaphragm defining a diaphragm plane, the diaphragm separated from the plurality of diaphragm suspension points by a spring gap in the diaphragm plane; a plurality of springs within the diaphragm plane and within the spring gap, each of the plurality of springs coupled to the diaphragm and to a corresponding one of the plurality of diaphragm suspension points, such that the diaphragm is movably suspended from the plurality of diaphragm suspension points when the microphone is in operation, and such that the diaphragm is spaced from the backplate by a variable diaphragm gap; and a sealing layer laminated on the diaphragm and spanning the spring gap, wherein the backplate and diaphragm form a variable capacitor of a microphone.