Homebrew PCBs

We've tried 10oz copper a with Hcl/H2O2 on a ceramic dielectric.  After several hours it was only about half way done.  The addition of the PCB fab-in-a-box "TRF" gave us significantly better toner etchant resistance.  


I'll remember the bubbler trick the next time.


-N



________________________________
 From: Leon Heller <leon355@...>
To: Homebrew_PCBs@yahoogroups.com 
Sent: Monday, May 14, 2012 11:31 AM
Subject: Re: [Homebrew_PCBs] Re: Slow Etch?
 

  
On 14/05/2012 19:24, Spencer wrote:
> I use the same solution and noticed heating doesnt help either. The
> biggest improvement in time that I get with my board came from sticking
> an aquarium air pump and with a hose with a bunch of holes that I did
> from a sewing needle into the solution. I get about 45 minute etch time
> now with my 1oz boards.

When I tried HCl and H2O2 it was very fast, with no heating. 
Concentrated HCl is required,

Leon
-- 
Leon Heller
G1HSM

 

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