Patent ID: 11863934
Assignee: AAC KAITAI TECHNOLOGIES (WUHAN) CO., LTD
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 0:
1. A MEMS microphone, comprising:
a substrate;
a capacitive structure disposed on the substrate, including a back plate and a vibration diaphragm spaced from the back plate, the vibration diaphragm including a main body, a plurality of supporting structures extending from a peripheral edge of the main body for supporting the main body, and an edge part disposed on an outer side of the main body and fixed to the substrate, the edge part and the main body spaced apart from each other and both located between two adjacent supporting structures; wherein
each of the supporting structures includes
a supporting beam fixed to the substrate and spaced from the main body;
two spring structures symmetrically arranged on both sides of the supporting beam and connecting the supporting beam and the main body respectively; and
each spring structure includes at least two zigzag-shaped beam arms extending along an extension direction of the peripheral edge of the main body; and a closest part of the beam arm is spaced apart from the main body.