Metal half hole molding method and manufacture method of printed circuit board

Abstract

The invention provides a metal half hole molding method. A metal half hole of a printed circuit board (PCB) is molded through a board milling procedure before the procedures of film removing, alkaline etching and tin removing in the manufacture process of the PCB. A manufacture method of the PCB is further provided. The manufacture method includes the metal half hole molding method which is used for manufacturing the metal half hole of the PCB. By means of the metal half hole molding method and the manufacture method of the PCB, the metal half hole is molded by milling the board before the procedures of film removing, alkaline etching and tin removing, the problem of residual copper wire burr is solved, and the effect of improving molding quality of the metal half hole is achieved.

Description

technical field

[0001] The invention relates to the field of printed circuit boards (PCBs), in particular to a metal half-hole forming method and a PCB manufacturing method. Background technique

[0002] Metal half hole is also called half PTH (plating through hole, plated through hole). figure 1 It shows a PCB with metal half-holes on all four sides of the unit according to the related art, figure 2 show figure 1 An enlarged schematic view of part A in . As shown in the figure, the so-called metal half hole refers to the metallized hole (or groove) that only half is left on the edge of the PCB shape, and the other half will be milled off during the shape processing.

[0003] The general mechanical processing method of circuit board forming is CNC forming machine milling. A metal half-hole forming method in the related art is to directly form metal half-holes in the process of milling the shape of the PCB after printing characters. The specific process is as follows: ...

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