Homebrew PCBs

John Myszkowski wrote:
> HI Markus,
> 
> That looks like a very impressive setup. 

I agree, he has put quite some effort into the apparatus.
However I really think he shouldn't of tried building the 
entire thing in one step, unless he had lots of experienced 
with the process and is familiar with copper plating tank 
design. For example it looks like he plans not to fully 
suberge the copper anodes and will inevidably get large 
amounts of oxidation at the air liquid interface. He also 
has some mild steel and brass around that area. Unless he 
will NEVER spill a drop of solution, this will corrode and 
ultimatly contaminate his bath will iron(II). As for the 
other tanks which I assume are for the electroless copper 
stages, I don't have any experience with so thats a whole 
different set of challenges he must deal with.

> What will happen if a joint leaks at night (or day) and chemicals 
> leak out into the electronics?

Imagine conductive salt soluions (especially the sulfuric 
acid copper plating at 4.8 ohm-cm at 20\ufffdC) shorting the 
transformer and blowing the fuse, which I sure hope he has 
installed one.

Adam