Etching PCB board....

Discussion in 'General Electronics Chat' started by RRITESH KAKKAR, Feb 5, 2015.

  1. RRITESH KAKKAR

    Thread Starter Senior Member

    Jun 29, 2010
    2,831
    89
    Hello,
    What would be the diff in result by using Ferric chloride anhydrous and combination of Mix Hydrochloric acid to Hydrogen peroxide in a ratio of 2:3 and drop your copper board into it. Within 5-10 seconds, you can see the copper removed from the board and tracks clearly visible.

    I was etching PCB but it was not etching properly taking time too much but not satisfy result.
    http://www.instructables.com/id/PCB...Etching-and-removing-toner-from-copper-board/


    Need help!
     
  2. GopherT

    AAC Fanatic!

    Nov 23, 2012
    5,981
    3,712
    Anhydrous means "water free". So first, it must be dissolved in water.
    Both methods work and you will find people with different opinions - some will like ferric chloride and some will like H2O2/HCl solution.

    Which method have you used? Why do you want to switch?
     
  3. sirch2

    Well-Known Member

    Jan 21, 2013
    1,008
    351
    Ferric chloride works much faster if heated to about 40C
     
  4. shortbus

    AAC Fanatic!

    Sep 30, 2009
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    And if it is agitated. I use a disposable foam paint brush to move the ferric solution over the the copper and it causes the etch to work much faster. Moving the already etched material and letting new copper to be exposed to the ferric.
     
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