Method for solving problem of oil bleeding of anti-welding plug hole in single-side windowed PCB (printed circuit board)

Abstract

The invention discloses a method for solving the problem of oil bleeding of an anti-welding plug hole in a single-side windowed PCB (printed circuit board). The method includes the steps: performing development processing on the single-side windowed PCB, performing light-sensitive curing on unexposed printing ink in the anti-welding plug hole in the single-side windowed PCB, and forming a layer of light-sensitive cured film so as to prevent oil bleeding in the subsequent curing process. In other words, the anti-welding plug hole is prevented from post-curing thermal expansion as a result of oil bleeding, so that quality and yield are improved. In addition, for the PCB, hardness of the printing oil is improved after one more time of UV (ultraviolet) curing, and the board is prevented from being scratched caused by carrying before post curing.

Description

technical field [0001] The invention relates to the technical field of printed circuit board processing and manufacturing, in particular to a method for solving the problem of oil leakage from solder-proof plug holes on a single-sided window-opening PCB. Background technique [0002] PCB (Printed Circuit Board), the Chinese name is printed circuit board, also known as printed circuit board, printed circuit board, is an important electronic component, a support for electronic components, and a provider of electrical connections for electronic components. Because it is made using electronic printing, it is called a "printed" circuit board. [0003] As the density of PCB board structure becomes higher and higher, PCB designers have increasingly designed via holes on the patch, and in order to consider PCB heat dissipation and avoid soldering short circuit, such structural boards are made in anti-soldering At the same time, more and more designs are choosing plug holes to open ...

AI Technical Summary

Problems solved by technology

[0007] In view of the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a method for solving the problem of oil leakage from the anti-solder plug hole on the single-sided windowed PCB board, so as to solve the problems of the film light transmission point and the plug hole in the prior art. The problem that the ink in the unexposed space is easy to expand and seep to the PAD or the nearby copper surface under the action of high temperature

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