Dec. 17, 2021
Advantages: it has high manufacturing precision and neat edges, process easy to control. It is suitable for the production of PCB boards with high pre…
Dec. 16, 2021
The solder resist development process in the printed board is a relatively simple process among all processes of the printed board, but it also plays …
Dec. 13, 2021
The possible reason of precipitation of etching solution in printed circuit could be the ammonia content is too low, or water dilution excess, or the …
Dec. 09, 2021
The circuit pattern we need is finally obtained by etching. The etching solution can be alkaline ferric chloride, acidic copper chloride and ammonia.D…
Dec. 09, 2021
Hot air leveling is to immerse the printed circuit board into the molten solder (63Sn / 37Pb), and then blow off the excess solder on the surface of t…
Dec. 03, 2021
The wet film itself is a blue viscous liquid synthesized from photosensitive resin and added with photosensitive agent, pigment, filler and solvent.
