Patent ID: 9544697
Date: 2017-01-10
CPC Classifications: H01L,H04R

Claim:
1. An acoustic transducer comprising: a substrate having a cavity; a vibrating electrode plate disposed above the substrate and having a void portion that allows pressure to escape; a fixed electrode plate disposed above the substrate opposite the vibrating electrode plate; and a leak pressure regulation portion that hinders leakage of air pressure by passing through the void portion when the vibrating electrode plate is not undergoing deformation, and that becomes separated from the void portion and allows pressure to escape by passing through the void portion when the vibrating electrode plate undergoes deformation from being subjected to pressure, wherein the void portion is a recession that is formed in an edge of the vibrating electrode plate and is recessed toward the interior of the vibrating electrode plate, and wherein the leak pressure regulation portion is a plate-shaped member that is located in the recession in the vibrating electrode plate when the vibrating electrode plate is not undergoing deformation.