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Electret microphone, manufacturing method thereof, and display device

A technology for electret microphones and display devices, which is applied to electret electrostatic transducers, sensors, electrical components, etc., can solve the problems that electret microphones cannot be used in display devices, and achieve the effect of small thickness

Active Publication Date: 2018-12-11
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present application provides an electret microphone, its manufacturing method, and a display device, which can solve the problem that the electret microphone in the related art cannot be applied to thin and light display devices. The technical solution is as follows:

Method used

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  • Electret microphone, manufacturing method thereof, and display device
  • Electret microphone, manufacturing method thereof, and display device
  • Electret microphone, manufacturing method thereof, and display device

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Embodiment Construction

[0051] In order to make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings.

[0052] The related art electret microphone is assembled from a variety of structures, which makes the electret microphone larger in volume, so the electret microphone in the related art cannot be applied to a thin and light display device. The embodiment of the present invention provides an electret microphone that can be applied to a thin and light display device.

[0053] figure 1 Is a schematic cross-sectional view of an electret microphone provided by an embodiment of the present invention, figure 2 Is a top view of an electret microphone provided by an embodiment of the present invention, and figure 1 show figure 2 Schematic diagram of the middle section WW, figure 2 The base substrate in the electret microphone is not shown in. P...

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Abstract

The invention discloses an electret microphone and a manufacturing method thereof, and a display device, belonging to the technical field of thin film. The electret microphone includes a first substrate and a second substrate arranged opposite to each other, wherein a first support film and an electret film are arranged on one side of the first substrate facing the second substrate in sequence, and a first cavity is formed between the electret film and the first substrate; A back electrode thin film, a switching transistor and an insulating second support thin film are arranged on a side of the second substrate facing the first substrate, and the back electrode thin film is connected with a gate electrode in the switching transistor, and a second cavity is formed between the electret thinfilm and the back electrode thin film. The present application solves the problem that an electret microphone in the related art cannot be applied to a lightweight display device, and provides an electret microphone that can be applied to a lightweight display device, and the present application is used for an electret microphone.

Description

Technical field [0001] This application relates to the field of thin film technology, in particular to an electret microphone, a manufacturing method thereof, and a display device. Background technique [0002] An electret microphone is a microphone commonly used in display devices. The electret microphone can convert sound waves into electrical signals. The electret microphone usually includes a metal shell, and metal pads and stationary Polar body structure, plastic support, metal back electrode and field effect transistor. [0003] Among them, the electret forms a cavity with the metal back electrode and the metal shell respectively, the metal back electrode is connected to the gate of the field effect transistor, and the source and drain pins of the field effect transistor protrude out of the metal shell. . It should be noted that the electret can accumulate charges under the action of an electric field, and when the electric field disappears, the charge on the electret will ...

Claims

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Application Information

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IPC IPC(8): H04R19/01H04R31/00
CPCH04R19/01H04R31/003H04R2231/001
Inventor 谢蒂旎
Owner BOE TECH GRP CO LTD
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