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Miniature microphone capacitance test method

A technology of capacitance testing and microphone, which is applied in the direction of electrical components, can solve the problems of time-consuming and labor-intensive, and achieve the effect of improving accuracy and eliminating misjudgment of product quality

Active Publication Date: 2014-06-25
WEIFANG GOERTEK MICROELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, since miniature microphone products are mass-produced, changes in materials and processes lead to the overall migration of batch capacitance parameters, and when only the consistency of capacitance is required during testing, it is necessary to manually re-measure the capacitance value of this batch of miniature microphone products. Time-consuming and labor-intensive

Method used

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Embodiment Construction

[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] figure 2 It is a schematic structural view of the equipment used in the miniature microphone capacitance testing method of the present invention; image 3 It is a flow chart of the miniature microphone capacitance testing method of the present invention; Figure 4 yes image 3 The detailed flowchart in the case where the two positive probes are connected to the positive pad. refer to figure 2 , image 3 and Figure 4 , miniature microphone capacitance testing method of the present invention, comprises the following steps:

[0042] a. Prepare the test probe set, channel selection switch 2, power supply and current detection module 3, capacitance detection module 4 and embedded control module 5. In order to make the structure compact and reduce the occupied space, the power supply and current detection module 3, capacitan...

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Abstract

The invention discloses a miniature microphone capacitance test method. The method comprises the steps that in the process of conducting quality detecting to a target miniature microphone, and the contact situation of a positive probe which is connected with a positive bonding pad in a contacted mode is determined through a current test loop; according to the specific contact situation of the positive probe, capacitance value of the target miniature microphone is acquired through a capacitance test loop, the quality situation is judged through comparing the capacitance value with the corresponding acceptable range value of the capacitance under the positive probe contact situation, various situations possibly occurring in the miniature microphone testing process are detailed, influence of wire to wire capacitance on the capacitance test result can be eliminated, the product quality misjudgment made by an embedded control module to the target miniature microphone caused by the wire to wire capacitance is eliminated, and measurement accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of measuring electronic components, in particular to a method for testing the capacitance of a miniature microphone. Background technique [0002] In recent years, miniature microphones have gradually been widely used in electronic products. The existing miniature microphones include many types, one of which is cylindrical, and its exterior is a package structure composed of a metal conductive shell and a circuit board. There are positive pads and negative pads for connection with the circuit on the terminal product. Its conductive shell is electrically connected to the internal capacitor of the microphone and the negative pad on the circuit board. The internal capacitor is used to convert the sound signal into an electrical signal. On the circuit board There are also external capacitors for signal processing. At present, such cylindrical miniature microphone products are generally assembled automatically t...

Claims

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Application Information

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IPC IPC(8): H04R29/00
Inventor 王维奎穆德宝陈军生
Owner WEIFANG GOERTEK MICROELECTRONICS CO LTD
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