Homebrew PCBs

From Finishing.com

Oct 6, 2003 

I can tell you general plating method. copper on aluminum 

1.etching(NaOH) 
2.desmut(HNO3) 
3.zincate 
4.strip(HNO3) 
5.zincate 
6.copper cyanide strike 
7.copper cyanide(high concentration) 
8.acid copper 
9.nickel 
10.chrome 

Why use Pt anode? copper ion source are solution and anode. 

So, plating electronic-quality copper on aluminum foil doesn't sound easy.

John



  ----- Original Message ----- 
  From: Andrew 
  To: Homebrew_PCBs@yahoogroups.com 
  Sent: Wednesday, July 04, 2007 6:36 PM
  Subject: [Homebrew_PCBs] Re: Has anyone tried...


  > SurfThenet wrote:
  >
  > Has anyone ever tried to make a printed circuit
  > board by printing a reverse image onto a sheet
  > of aluminium foil [with an ink jet printer],
  > then plating copper onto the exposed trace?
  > This sheet would be epoxied [copper side down]
  > onto a thin fiber glass board, allowed to set
  > and then caustic soda would eat the aluminium
  > away leaving the copper trace behind.
  > 
  > Sound feasible? See any obvious problems with
  > the approach?

  Apart from the fact that is sounds harder and
  more expensive than just using photographic
  emulsion as nature/god/kodak intended.



   

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