Category:PCB PCB Manufacturing

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PCB manufacturing consists of many steps, such as PCB CAM, Panelization, Copper patterning, etc. This group is mainly talked about the problems during PCB manufacturing!

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Etching problem Reply 2016-06-09 08:10:46
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Carr

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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?
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Statement: This post is only the personal view of the author and does not represent the opinions of ALLPCB.com.

Mikael

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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

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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

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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

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I certainly enjoyed reading your post.
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