Method for preparing short slotted hole in printed circuit board

Abstract

The invention discloses a method for preparing a short slotted hole in a printed circuit board, which comprises the following steps of respectively preparing a guide hole in two sides of the short slotted hole, wherein the diameter of each guide hole is half of the slot length of the short slotted hole; according to the slot width of the short slotted hole and the limit deviation, selecting a slot mill; using the slot mill to drill a slot in the position defined by the guide holes, wherein the slot drilling feed speed is smaller than or equal to 0.6m per minute. According to the method for preparing the short slotted hole in the printed circuit board, the guide holes of which the diameters are equal to half of the slot length of the short slotted hole are firstly prepared; the guide holes exist, so that during slot drilling, the slot mill is stressed evenly, the problems of shorter slot length, slot edge gap, slot deviation and the like difficultly occur, the yield of the prepared short slotted hole is improved, the product stability is effectively improved, the product yield is further improved, and the probability that the printed circuit board is scrapped due to the slotted hole problem is reduced.

Description

technical field [0001] The invention relates to the technical field of printed circuit board preparation, in particular to a method for preparing short slots on a printed circuit board. Background technique [0002] With the development of miniaturization of various electronic devices, the specifications of printed circuit boards are becoming smaller and smaller, and people's requirements for the quality of printed circuit boards are also getting higher and higher. The requirements for the preparation of slots on printed circuit boards are also correspondingly increased, especially the preparation of short slots (slots whose slot length is less than twice the slot width). In the traditional short slot preparation process, the gong groove process is adopted, that is, a gong knife less than 0.20 mm in width is first used to form a straight line in the middle of the groove, and then a 1.00 mm gong knife is used to shape it. This method is time-consuming, and problems such as s...

AI Technical Summary

Problems solved by technology

This method is time-consuming, and problems such as short slot length, slot edge gap, and slot offset are prone to occur during the preparation process. The qualified rate of the short slots prepared is low, which makes the scrap rate of printed circuit boards due to slot problems high.

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