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Detection method of pcb sink hole

A detection method, countersunk technology, applied in the direction of mechanical depth measurement, etc., can solve the problem that the quality has not been effectively monitored, and achieve the effects of shortening the confirmation time, ensuring quality control, and increasing production costs

Active Publication Date: 2019-01-18
GCI SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quality in the mass production process has not been effectively monitored

Method used

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  • Detection method of pcb sink hole
  • Detection method of pcb sink hole
  • Detection method of pcb sink hole

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Embodiment Construction

[0037] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0038] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as...

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Abstract

The invention relates to a PCB counterbore detection method. The method comprises the following steps: a test board is acquired, wherein the test board is provided with a first face, an opposite second face and a to-be-detected counterbore; a gauge is made, wherein the gauge is provided with a measurement part whose shape is matched with that of a first section and a no-go part which is used for being clamped at the connection place between the first section and a second section sequentially along the axial direction; and measurement is carried out, the measurement part of the gauge is inserted in the counterbore from the opening of the second section, the length A1 of the measurement part extending out of the first face is measured, the depth of the first section L=A-A1 is calculated, and the measurement is completed. A new method for PCB counterbore detection is provided; the gauge is adopted to measure the depth of the first section of the counterbore; the measurement time for each hole only requires 10 to 20 seconds, the counterbore first article assurance time is greatly shortened, the PCB is not damaged as the gauge is adopted for measurement, and the production cost is not increased.

Description

technical field [0001] The invention relates to the technical field of printed circuit boards, in particular to a detection method for counterbore holes in PCBs. Background technique [0002] The inspection method for PCB counterbore in the prior art is to measure the residual thickness of the counterbore by making crystal slices, and the time for making each crystal slice is 30 minutes, which will affect the production efficiency. [0003] Moreover, when making crystal slice sampling, it is necessary to take the sink hole in the PCB unit as a crystal slice to measure the residual thickness of the sink hole, and to make the slice needs to destroy the production board, resulting in an increase in production input costs. In the mass production process, in order to reduce the scrap caused by the sampling of the first piece, we usually judge the mass production after the first piece is qualified, and no slice measurement is performed during the process. Quality during mass prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B5/18
CPCG01B5/18
Inventor 李桂群蒋茂胜虞铭陈永华
Owner GCI SCI & TECH
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