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Microphones and Electronics

A microphone and electret technology, applied in the field of microphones and electronic equipment, can solve problems such as easy breakage or damage, weak pressure resistance, and inability to protect MEMS microphone units, and achieve the effect of improving the automatic waterproof function

Active Publication Date: 2020-05-29
WEIFANG GOERTEK MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, as the thickness of the filter increases, the frequency response of the MEMS microphone device may deviate from
In addition, the existing filters are relatively weak against pressure. For example, once they are impacted by large wind pressure or water pressure, they are very easy to break or damage, and cannot effectively protect the MEMS microphone unit.

Method used

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  • Microphones and Electronics
  • Microphones and Electronics
  • Microphones and Electronics

Examples

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Embodiment Construction

[0031] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0032] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0033] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

[0034] In all examples shown and discussed herein, any specific values ​​should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have dif...

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Abstract

Disclosed are a microphone and an electronic device, comprising a housing having an internal chamber and a microphone unit disposed in the internal chamber of the housing; and further comprising an acoustically sealed electret film and a polar plate. The electret film can seal a channel between a sound hole and the microphone unit when the electret film and the polar plate are attracted to each other. A surface potential Vs of the electret film relative to the polar plate satisfies VPIwater < Vs < VPIair, wherein VPIwater represents an attraction voltage between the electret film and the polar plate when in water, and VPIair represents an attraction voltage between the electret film and the polar plate when in air. The microphone in the invention has an automatic water-resisting function, and can resist a large water pressure.

Description

technical field [0001] The present invention relates to the field of electroacoustic technology, and more specifically, to a microphone and electronic equipment. Background technique [0002] MEMS (Micro-Electro-Mechanical Systems) is a class of miniaturized mechanical and electro-mechanical components that in their most general form can be defined as being made using microfabrication. The MEMS microphone unit can first be fabricated and then packaged in a micro-electromechanical microphone device on a substrate. MEMS microphone devices can also be assembled into electronic devices such as mobile phones, tablet computers, laptops, VR, etc., and are widely used. [0003] Due to the relatively small size of the MEMS microphone unit, the manufacturing environment will affect the performance of the electronic device with the MEMS microphone device. In the MEMS microphone unit, the diaphragm and the back plate are very important components. The diaphragm and the back plate toge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R19/04
CPCH04R19/04
Inventor 邹泉波
Owner WEIFANG GOERTEK MICROELECTRONICS CO LTD
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