This is also a very good technique for containing the EMI radiation component that is produced by the internal circuitry and escapes through the edge of the board provided the edge plating is grounded.

Best regards

Lee

J. Lee Parker, Ph.D.
JLP Consultants LLC
804 779 3389 
  ----- Original Message ----- 
  From: Franklin Asbell<mailto:[log in to unmask]> 
  To: [log in to unmask]<mailto:[log in to unmask]> 
  Sent: Tuesday, November 22, 2005 5:55 PM
  Subject: Re: [TN] Wrap Around Plating


  You may be describing edge plating, I'll explain.

  There are times when a connection needs to be made from the top to the
  bottom of a board and the only real estate is the board edge.

  The board is processed normally until electroless copper where it is routed
  to expose the edge needing the connection.

  The board/panel is processed normally through final rout.

  At it's completion those areas routed before 1st copper now have an
  electrical connection between the top and bottom.

  When viewed from the top/side it can appear as though metal were formed or
  wrapped around the edge I suppose.

  Franklin

  -----Original Message-----
  From: TechNet [mailto:[log in to unmask]] On Behalf Of Roland Jaquet
  Sent: Tuesday, November 22, 2005 4:45 PM
  To: [log in to unmask]<mailto:[log in to unmask]>
  Subject: [TN] Wrap Around Plating

  Dear Technetters,

  I am a bit confused about a terminology - I checked the archives with no
  better understanding.

  Wrap Around Plating

  The occurrence and usage of those three words are no clear about what is
  understood within the PCB industry ..

  Are we talking to protective films / masks / resists

  Or plating on surface, sides, of feature?

  Or about a packaging including embedded features

  Is this an other one we don't use but abuse?



  Thank you for your help

  Best Regards
  Rol@nd<mailto:Rol@nd>

  www.PCBspecialist.com<http://www.pcbspecialist.com/>


  Jaquet Roland
  Consultant
  PCBspecialist
  14 Champ Budin
  1258 Perly, GENEVA
  Switzerland
  [log in to unmask]<mailto:[log in to unmask]>
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  fax:
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  41228800405
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  41792033723

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