Etching problem

2016/6/9 8:10:46

etching pcb manufacturing

There are two PCBs goes to the etching process, and on two separate occasions each with new Ferric Chloride mixture, a discolourment will occur and the PCB will turn a tint black, then after a while it turns green, or drys to a dark brown. What is going wrong?

Mikael

2016/11/25 21:41:30

Warming FeCl will speed the process a lot, and give it less time to go wrong. Of course, it also goes faster to be wrong.

James

2016/10/20 12:13:25

Th eprocess you are doing is exposing the PCB's to the UV light, it should not take more than about 15 mins. So I guess the problem maybe because you are exposed too long.

Dan

2016/9/27 11:09:05

It depends on the temperature of your ferric solution. The best should be around 100F. The water you used will also effect the result. Distilled water will give better results than tap water.

Adair

2016/6/11 8:10:46

I certainly enjoyed reading your post.

Etching problem

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