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Copper sheet for Ground?

Discussion in 'General Electronics Discussion' started by ssniesle, Apr 28, 2012.

  1. ssniesle

    ssniesle

    4
    1
    Apr 28, 2012
    I apologies if this is elementary, but I took apart an ipad dock/stand and found that three of the control buttons on a pcb is attached to a 1"x3" copper sheet (which is glued to the plastic housing).
    Is this used for ground? I don't understand why they would do this if it is ground, since there is another ground wire near by and I also don't understand how ground works in this case.
    Please educate me.

    Thank you
     

    Attached Files:

  2. CocaCola

    CocaCola

    3,635
    4
    Apr 7, 2012
    Likely a grounded shield, to block interference...
     
  3. ssniesle

    ssniesle

    4
    1
    Apr 28, 2012
    please explain

    What would it be shielding? And can I attach this shield to any surface and still act as ground?
     
  4. davenn

    davenn Moderator

    13,263
    1,749
    Sep 5, 2009
    if it acting as a shield, it would be for RF shielding to lower the amount of RF being radiated by the iPad.
    Shielsing would normally be around /close to the areas that radiated the most .
    many items of electronics have RF shielding.... another common one is switch mode power supplies for laptops etc

    Dave
     
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