Patent ID: 9686619
Date: 2017-06-20
CPC Classifications: B81B,B81C,H04R

Claim:
1. A microelectromechanical system (MEMS) microphone comprising: a backplate; a back cavity aligned with the backplate; at least one post extending from the backplate toward the back cavity; a membrane positioned between the backplate and the back cavity and including an inner portion and an outer portion; a gap defined by a planar portion of the inner portion and the backplate; a spring arm defined in the outer portion and supported by the at least one post; a first leak path between the back cavity and the gap defined between the inner portion and the spring arm; a second leak path between the back cavity and the gap defined between the spring arm and the back cavity; and a first leak path constriction configured to restrict leakage through at least one of the first leak path and the second leak path.