Better Etchant: Ferric Chloride or Cupric Chloride?

Thread Starter

rahulb

Joined Jun 5, 2019
21
Hi Everyone,

Which one will be a better etchant for pcb prototyping, ferric chloride or cupric chloride.

I heard cupric chloride is more toxic in nature. I need a good resolution as well as less toxicity.

thanks
 

jpanhalt

Joined Jan 18, 2008
8,781
They are virtually the same. It is said that ferric chloride causes less undercutting, but the difference is very slight. In fact, ferric chloride becomes cupric chloride with long use if you replace the HCl.

I use both. Subjectively, I feel over etching is less of a problem with ferric chloride.
 
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