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This blog is written by splintergroup | 12 entries so far

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Etching your own copper panels #6: Etch and Finish

11-02-2016 06:57 PM by splintergroup | 7 comments »

Here we are with a etching acid resist applied to the PCB: Next step….. EtchingSimply stated, the etching process needs to remove any copper that is not protected by the resist applied during the previous steps. Copper is very reactive to acids. Traditionally the primary chemical used for PCB manufacturing was Ferric Chloride (FeCl3). I have a “stash” of this stuff from the 1980’s. It works well, but I’ve noticed that it is fairly expensive now ($8/pint, powder or liquid). A pint will etch about 200 square inches of standard (1 ounce) copper. I Have it so that is what I’ll use. The down side to Ferric Chloride is that in reacting with copper, i...

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