Common fault analysis of PCB alkaline etching
Dec. 13, 2021The possible reason of precipitation of etching solution in printed circuit could be the ammonia content is too low, or water dilution excess, or the …
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 …
The circuit pattern we need is finally obtained by etching. The etching solution can be alkaline ferric chloride, acidic copper chloride and ammonia.D…
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…
The wet film itself is a blue viscous liquid synthesized from photosensitive resin and added with photosensitive agent, pigment, filler and solvent.
PCB ink is generally divided into three types: PCB etching ink, solder mask ink and text ink. Others are conductive carbon oil (also known as conducti…
Blistering on the board surface of the circuit board is actually a problem of poor adhesion of the board surface. Further extension is the surface qua…