Homebrew PCBs

Guys

I have been facing a problem in getting 15x10 sq.cm
single side boards etched under 5 mins. I use
commercial grade FeCl3 and heat up the water to
boiling point. Then add it in a plastic tray having
FeCl3 and after mixing thoroughly, drop the boards.

I keep enough solution in the tray to just have the
board below the surface at an uniform 4mm.

But I have to heating mechanism due to which the
solution cools down after 2 mins. I also constantly,
manually rock the tray a little to remove "dust"
formed on the boards.

Currently this is taking me more than 20 mins for the
etching to complete !

I think I am wasting too much time behind an
ineffective/inefficient etching process - the
equipments I am using ssem to be far from optimal..

Any tips on ultrafast (sub 10 mins) etching ?

KamalS



       
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