Homebrew PCBs

Hello Adam,

Friday, April 19, 2002, 5:04:15 AM, you wrote:

AS> Has anyone out there done copper etching with ammonia
AS> hydroxide and copper sulfate solution ? I'm interested in
AS> learning new ways of making the ammonical etching tank for
AS> hobbyist. Currently I have a working etching tank based on
AS> this chemistry. The major problem witht his type of etchant
AS> is ammonia fumes. The way I solved this was to build a
AS> sealed tank and have a slotted opening on the lid for
AS> inserting the PCB. When the tank is not in use the slot is
AS> sealed with a rubber strip leaving the tank almost air
AS> tight. I would like to here what others have done.

AS> Adam S



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And I replied:

Why  ammonia?  For  homemade  PCB's  good  results  can  be  achieved  using
combination of CuCl and HCl. No fumes and can be bubble assisted.

-- 
 Best Regards,
 Zoran
 mailto:zasto@...