Circuit board processing method

Abstract

The invention provides a circuit board processing method. The processing method of the circuit board comprises the following steps: drilling the circuit board with copper, and forming a positioning hole in the edge of a milling area of the circuit board with copper; selecting a milling cutter for milling the circuit board with copper; setting a milling path of the circuit board with copper by taking the positioning point as an original point, the milling path comprising a rough milling path and a finish milling path, the rough milling path being adjacent to the finish milling path, the finishmilling path being greater than the rough milling path, and the distance between the finish milling path and the rough milling path being a predetermined width; controlling the milling cutter to perform rough milling operation on the circuit board with copper along the rough milling path; and controlling the milling cutter to perform finish milling operation on the circuit board with copper alongthe finish milling path to obtain the circuit board with a metal groove. According to the processing method of the circuit board, milled sawteeth can be completely eliminated, and chip removal is easy.

Description

technical field [0001] The invention relates to the technical field of printed circuit board manufacturing, in particular to a method for processing a circuit board. Background technique [0002] With the rapid development of electronic products, people's high requirements for product quality have also led to higher and higher requirements for electronic manufacturers on printed circuit boards, and the difficulty of forming and processing boards is becoming more and more difficult. There are more and more requirements for molding, small spacing between sheets, and molding without process edges. Requirements for tolerances of ±0.075mm and ±0.10mm for external dimensions abound, and there are more and more complaints that affect the failure of normal pick-and-place testing of client fixtures. CNC will use rough and fine milling to control the accuracy of inner groove and shape. [0003] However, with the complexity of products, many high-density interconnected printed circui...

AI Technical Summary

Problems solved by technology

[0003] However, with the complexity of products, many high-density interconnected printed circuit boards adopt the process of CNC milling of circuit boards with copper, that is, the metallization groove process. When milling circuit boards with high TG and thick copper, not only The tool wear is huge, and both of them produce a large amount of copper wire and massive powder chips during milling, which are easy to block the chip discharge port, resulting in continuous high temperature of the milling cutter, poor milling accuracy or stability, and prone to milling. sawtooth

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