US 12,219,336 B2
Sealed dual membrane structure and device including the same
Colin Robert Jenkins, Eb (GB)
Assigned to AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD., Shenzhen (CN)
Filed by AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD., Shenzhen (CN)
Filed on Nov. 23, 2022, as Appl. No. 17/993,800.
Prior Publication US 2024/0171913 A1, May 23, 2024
Int. Cl. H04R 7/06 (2006.01); H04R 1/04 (2006.01); H04R 7/16 (2006.01); H04R 19/04 (2006.01)
CPC H04R 7/06 (2013.01) [H04R 1/04 (2013.01); H04R 7/16 (2013.01); H04R 19/04 (2013.01); H04R 2307/023 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A sealed dual membrane (SDM) structure, comprising:
a substrate;
a first vibrating membrane and a second vibrating membrane disposed on the substrate, the first vibrating membrane, the second vibrating membrane and the substrate together forming a sealed cavity;
a first back electrode plate and a second back electrode plate disposed between the first vibrating membrane and the second vibrating membrane, and
a conductor plate unit disposed between the first back electrode plate and the second back electrode plate;
wherein the first vibrating membrane and the second vibrating membrane are mechanically coupled to the conductor plate unit, and
wherein the conductor plate unit forms a capacitor structure with each of the first back electrode plate and the second back electrode plate; each of the first back electrode plate and the second back electrode plate has a conductive layer and at least one insulator layer facing the conductor plate unit.