Rapid deviation inspection method for mechanical drilling

Abstract

The invention discloses a rapid deviation checking method for mechanical drilling, which comprises the following steps: performing deviation module pattern design by adopting a via hole disc and a wire, forming a pattern needing to be conducted on each layer needing to be monitored by adopting a film pasting, exposing, developing and etching mode for the deviation module pattern; the non-conducting mechanical hole is designed at the relative position of the wire according to the deviation requirement needing to be monitored, penetrates through the monitoring layer, and forms a loop capable of forming a required power-on test and a form capable of being visually detected with the graphic design. Conducting mechanical holes or conducting laser holes are designed at the two ends of the circuit; a universal meter or a simple on-short circuit clamp or an electric measurement mode is used for judging and analyzing the resistance values of an on circuit, an off circuit and a line in a loop so as to confirm the deviation performance of the mechanical hole. By adopting the methods of pattern making, mechanical drilling and the like, the deviation of the mechanical hole to each layer and the deviation method can be more effectively detected, and meanwhile, the different degrees and directions of the deviation of a single layer can be confirmed.

Description

technical field [0001] The invention relates to the field of circuit boards, in particular to a method for quickly deflecting mechanically drilled holes. Background technique [0002] At present, the production of circuit boards is developing in the direction of high precision and density. Due to the influence of circuit design, the distance between mechanical holes and conductors and the distance between mechanical hole pads are getting smaller and smaller. At present, the detection of mechanical drilling deviation is mainly through the X-ray machine to check the deviation of the mechanical hole pad or visually check whether there is exposed copper on the hole wall. However, as the number of layers increases, the position and direction of each layer cannot be accurately shifted after stacking; in addition, it is also difficult to check whether copper is exposed on the wall of the non-plated mechanical hole due to the increase in the number of layers, and there is a risk of ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the prior art, one of the purposes of the present invention is to provide a quick deviation inspection method for mechanical drilling, which can solve the problems of low detection efficiency and low recognition

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