How to choose a defoamer for circuit board cleaning

With the continuous development of the printed circuit board industry, the number of manufacturing layers is increasing, the lines are getting thinner and denser, the line spacing is getting smaller and smaller, and the problem of bridge connection is more and more prominent. There is no bridging between the board lines, which improves the quality of the printed circuit board; then a lot of foam must appear during the cleaning process. A cleaning defoamer must be used, and it must be water-soluble, fast in defoaming, and strong in foam suppression. , Small amount, easy to use, easy to operate, high product effect rate, no rich products, no need for three waste treatment.

image12-3

When cleaning circuit boards, it is necessary to use a dedicated defoamer for circuit board cleaning. Especially in the dry film process in the production process of printed circuit boards, the unexposed dry film is removed by development. The dry film is a photosensitive insulating resin, and the developing solution is a sodium carbonate solution. Due to the constant dissolution of the dry film, the developing solution generates a certain amount of foam during the cyclic spraying of the system. When the foam reaches a certain level, it will affect the quality of the development and cause inconvenience to production. Therefore, in industrial production, a certain amount of defoamer for cleaning circuit boards is often added when the cylinder is opened to suppress the generation of foam.

A defoamer specifically designed for printed circuit board manufacturing can overcome its hazards. Due to the particularity of the printed board manufacturing process, its requirements for defoaming agents are relatively strict. In addition to requiring excellent defoaming and antifoaming capabilities, it is also required that the defoaming agent does not have any residue on the printed board and is alkaline. Effective under conditions.

 


Post time: Dec-03-2019