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MEMS microphone and electronic device

An electronic device and microphone technology, applied in the field of microphones, can solve problems such as pollution, failure, and performance degradation of MEMS microphones, and achieve the effect of improving signal-to-noise ratio and quality

Inactive Publication Date: 2021-06-18
GOERTEK MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional MEMS microphones usually have a sound inlet on the shell, which will cause the packaging cavity inside the shell to be directly exposed to the external environment through the sound inlet, so that foreign objects such as dust in the external environment are very easy to pass through the inlet. The sound hole falls into the package cavity, and then pollutes or damages the components in the package cavity (such as MEMS chip, ASIC chip, circuit on the PCB board, etc.), and finally leads to the performance degradation or even failure of the MEMS microphone

Method used

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  • MEMS microphone and electronic device
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  • MEMS microphone and electronic device

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Embodiment Construction

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. . Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, if there are descriptions involving "first", "second" and...

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Abstract

The invention discloses an MEMS microphone and an electronic device. The MEMS microphone comprises a PCB and a shell, wherein the PCB is provided with a bottom surface, a top surface and a side surface arranged along the circumference of the PCB; the shell is arranged on the top surface of the PCB so as to define a packaging cavity with the PCB; wherein the PCB is provided with a sound inlet channel, the sound inlet channel is provided with a sound channel inlet and a sound channel outlet, the sound channel inlet is formed in the side face, and the sound channel outlet is formed in the top face and communicated with the packaging cavity. According to the MEMS microphone provided by the invention, the situation that foreign matters such as dust in an external environment fall into the MEMS microphone can be reduced, so that the signal-to-noise ratio of the MEMS microphone is improved.

Description

technical field [0001] The invention relates to the technical field of microphones, in particular to a MEMS microphone and an electronic device. Background technique [0002] A Micro Electro Mechanical System (MEMS microphone for short) is usually applied to an electronic device as an acoustic-electric conversion device. However, traditional MEMS microphones usually have a sound hole on the shell, which will cause the package cavity inside the shell to be directly exposed to the external environment through the sound hole, so that foreign objects such as dust in the external environment can easily pass through the sound hole. The sound hole falls into the package cavity, and then pollutes or damages the components in the package cavity (such as MEMS chip, ASIC chip, circuit on the PCB board, etc.), and finally leads to the performance degradation or even failure of the MEMS microphone. Contents of the invention [0003] The main purpose of the present invention is to prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R19/04H04R1/12H04R31/00
CPCH04R19/04H04R1/12H04R31/00H04R2201/003
Inventor 石杰王顺金龙
Owner GOERTEK MICROELECTRONICS CO LTD