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Detecting method for back drilling and missed drilling

A detection method, the technology of missed drilling, applied in the direction of electronic circuit testing, etc., can solve the problems of easy missed detection, difficult manual detection, low efficiency, etc., achieve accurate detection and positioning, reduce product risk, and save labor costs.

Active Publication Date: 2010-03-10
SHENNAN CIRCUITS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a detection method for back-drilling and missing drills, which solves the problems in the prior art that manual detection is difficult, the efficiency is low, and it is particularly easy to miss detection.

Method used

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  • Detecting method for back drilling and missed drilling

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Embodiment Construction

[0022] Please also refer to figure 1 and figure 2 , the detection method of back drilling and leakage drilling of the present invention mainly comprises the following steps:

[0023] (1) Make test data with back drilling, and output it as an on-off test program;

[0024] (2) Make a test frame with back drilling position, and install it on the PCB board electrical performance tester;

[0025] (3) Install the PCB board on the test stand, and test the electrical performance of the back drill part;

[0026] (4) Processing of test results.

[0027] The above detection method adopts figure 1 The shown testing system 100 mainly includes an electrical performance testing machine 10 and a testing rack 20 installed on the testing machine 10 . The electrical performance testing machine 10 used can be a general-purpose or dedicated on-off testing machine for PCB boards, such as the KM06AA equipment sold by China Kaima Company or other existing equipment.

[0028] The upper and lowe...

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Abstract

The invention relates to a detecting method for back drilling and missed drilling of a plated through hole of a PCB, comprising the following steps of: manufacturing testing data including back drilling holes, compiling the testing data into an electric performance testing program, and then inputting the program into a control program of an electric performance testing system of the PCB; manufacturing a testing frame including the position of the back drilling holes and installing the testing frame in an electric performance testing system of the PCB; installing the PCB to be detected on the testing frame and carrying out electric performance test to the back drilling holes according to a preset program; processing a testing result; and analyzing and locating the back drilling holes of missed drilling according to the electric performance testing result. The method can realize automatic detection, accurately detect and locate the position of the back drilling holes of the missed drilling in a simple, high-efficiency and accurate manner, save the manual cost of detection and reduce the product risk.

Description

technical field [0001] The invention relates to a detection method for printed circuit boards, in particular to a detection method for back drilling and leakage drilling of plated through holes on the printed circuit board. Background technique [0002] In the manufacturing process of PCB board, blind holes are needed to realize the electrical connection between inner circuit layers. Blind holes are usually produced by drilling rigs, and their processing accuracy is high. A conductive layer is formed in the hole for electrical connection. However, there is no connection at the end of some plated through holes, which will cause the signal to fold back and the resonance will be reduced, which may cause reflection, scattering, delay, etc. of signal transmission, which will bring "distortion" to the signal. This requires further processing of the plated-through holes, ie back-drilling. The function of back-drilling is actually to drill out the through-hole section that does no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/28
Inventor 孙鑫吴迎新
Owner SHENNAN CIRCUITS