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Method of machining burr-free hole of PCB copper-based core board

A processing method and the technology of punctured holes, which are applied in the fields of removing conductive materials by chemical/electrolytic methods, manufacturing electrical components, and printed circuits, can solve the problems of large consumption of gongs and knives, increased production costs, and low production efficiency. Achieve the effect of reducing production cost and improving production efficiency

Inactive Publication Date: 2017-02-22
四川英创力电子科技股份有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing printed circuit boards use drilling, CNC drilling or stamping punching to produce the required copper-based core boards. During the drilling, CNC or stamping and other mechanical processing processes, burrs and burrs will be generated. , and once the burrs are inserted into the hole, it is difficult to remove. At the same time, because it is a metal base, the consumption of drill bits and gongs will be large during the processing process, the production cost will increase, and the production efficiency will be low.

Method used

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  • Method of machining burr-free hole of PCB copper-based core board

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Embodiment 1

[0025] A method for processing a PCB copper-based core board without a front hole, comprising the following steps:

[0026] (1) Preparation of resist layer

[0027] ① Production of film with graphics. Film (film) is a kind of film, produced by Fuji, Japan.

[0028] Make films with round holes of different sizes on the film, depending on the position and size of the holes to be opened on the copper substrate to be produced later. After the graphic area of ​​the film is exposed and developed, the protective film corresponding to the graphic area is washed away by the developer, while the protective film in the non-graphic area is retained; the film used in the circuit board is divided into positive and negative films, and the graphic area of ​​the positive film (non-graphic area) The light-transmitting area) is the pattern required for circuit board production. After exposure and development, the corresponding protective film is rinsed to expose the copper surface, and the cop...

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Abstract

The invention discloses a method of machining a burr-free hole of a PCB copper-based core board, and relates to the field of circuit board manufacturing. The method comprises the following steps: (1) making a resist layer; (2) etching a copper-based core board; and (3) removing the resist layer. Compared with the prior art, the burr problem caused by mechanical machining such as drilling, CNC drilling or punching is overcome, the production cost is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of printed circuit boards, in particular to a method for processing PCB copper-based core boards without piercing holes. Background technique [0002] Existing printed circuit boards use drilling, CNC drilling or stamping punching to produce the required copper-based core boards. During the drilling, CNC or stamping and other mechanical processing processes, burrs and burrs will be generated. , and once the edge burr enters the hole, it is difficult to remove. At the same time, because it is a metal base, during the processing, the consumption of the drill bit and the gong knife is large, the production cost increases, and the production efficiency is also low. Contents of the invention [0003] One of the purposes of the present invention is to provide a method for processing PCB copper-based core boards without burrs, which overcomes the problems of burrs and burrs caused by mechanical processing such as drilling,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K3/06
CPCH05K3/06H05K2203/052
Inventor 李清华艾克华
Owner 四川英创力电子科技股份有限公司