Microphone

Patent metadata

Field	Value
Publication number	US-10034101-B2
Application number	US-201715416084-A
Country	US
Kind code	B2
Filing date	Jan 26, 2017
Priority date	Oct 25, 2016
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

A microphone includes a conducting vibrating diaphragm; a back plate opposed to the vibrating diaphragm and including a plurality of through holes; a first electrode formed in a middle of the back plate; a second electrode formed at an edge of the back plate; and a support portion located between the first electrode and the second electrode for supporting the vibrating diaphragm when the vibrating diaphragm is electrified. When the sound pressure is applied in the middle of the vibrating diaphragm and drives the vibrating diaphragm to deform, the middle of the vibrating diaphragm moves relative to the first electrode, and the edge of the vibrating diaphragm moves relative to the second electrode, at this time, the first electrode and the second electrode generate reversed electric signals.

First claim

What is claimed is:

1. A microphone, comprising:
a conducting vibrating diaphragm;
a back plate opposed to the vibrating diaphragm and including a plurality of through holes;
a first electrode formed in a middle of the back plate;
a second electrode formed at an edge of the back plate;
a support portion located in an insulation gap formed between the vibrating diaphragm and the back plate, the support portion being located between the first electrode and the second electrode for supporting the vibrating diaphragm when the vibrating diaphragm is electrified;
when the vibrating diaphragm is electrified, the vibrating diaphragm absorbed by an electrostatic force and supported by the support portion, the vibrating diaphragm parallel to the back plate;
when the sound pressure is applied in the middle of the vibrating diaphragm and drives the vibrating diaphragm to the deformed, the middle of the vibrating diaphragm moving along a direction relative to the first electrode, and the edge of the vibrating diaphragm moving along an opposite direction relative to the second electrode, the first electrode and the second electrode generating reversed signals.

2. The microphone as described in claim 1 , wherein the support portion is a continuously closed ring structure, or includes separated columns.

3. The microphone as described in claim 1 , wherein the vibrating diaphragm is made from conducting material.

4. The microphone as described in claim 1 , wherein the vibrating diaphragm includes conducting glue formed on a surface of the diaphragm facing the back plate.

5. The microphone as described in claim 1 , wherein the first electrode includes a plurality of opening formed therethrough.

Assignees

• Zhang Jinyu
• Aac Technologies Pte Ltd

Inventors

• Zhang Jinyu

Classifications

• H04R2201/003

  Mems transducers or their use · CPC title

• H04R19/005

  using semiconductor materials · CPC title

• H04R19/04 Primary

  Microphones (H04R19/01 takes precedence) · CPC title