1, when in the production of PCB circuit board
factory, one of the process need to use dry film wet film, in fact, dry film wet membrane function is basically similar, but if the surface is uneven or don't have to be very thin, set up the height of the thicker or state such as film thickness, circuit board manufacturers can consider to use wet film.
If there is a hole in the PCB, the dry film would have been more appropriate.
And if the environment is not easy to keep clean, dry film also easier to control the quality of the operation.
Although the wet film material is relatively cheap, but it is not available everywhere.
Use in addition to general considerations, still should meet the needs of the manufacturer's own work environment.
2, dry film is easy to operation, the unit price is slightly high specific humidity membrane.
But because easy to keep clean and better sex too without going through baking, so using the better.
But for the thin film thickness, especially under 15 microns thickness of dry film is not easy to do.
Another wet film filling ability better is its advantages, but because there is no protective film, so you need a higher exposure energy, and the pros and cons of different views have different views, this must be the user more attentively, to get more suited to their own conclusions.
3, the general called wet film, are almost used in welding paint wet film, as for the applications of inner plate, the proportion of wet film will become more and more high, it's because of cheap and technical maturity gradually improve.
But the two inner circuit board production.
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