Thanks Lee,
We know the gold is under control - I have SPC data on the thicknesses
and purity which shows about a 5.5 sigma control level. We have also
checked our packaging - it is clean. This is only coming from one of my
customer's - the other customers I asked do nothing - just take them out
and start bonding - consistently they get pulls in the 14 - 16 lb.
range. Regards Steve

Steve Kelly
PH: (416) 750-8433
FAX: (416) 750-0016
CELL: (416) 577-8433


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Lee parker
Sent: Wednesday, January 11, 2006 10:29 AM
To: [log in to unmask]
Subject: Re: [TN] Wire bondable gold pads

Gold is the most noble metal of all. Gold is essentia
Steve

Gold is the most noble metal of all. Gold is essentially inactive which
is also why it is so valuable and difficult to dissolve. If oxides are
forming on gold surfaces it is usually because the under coating is
exposed at the surface or there are impurities in the gold. Since
bondable gold is usually pure gold, impurities should not be present. It
the problem is organic films, (which are not complexed to the gold) the
problem may be residual or packing.

Best regards

Lee

J. Lee Parker, Ph.D.
JLP Consultants LLC
804 779 3389
  ----- Original Message -----
  From: Steve Kelly<mailto:[log in to unmask]>
  To: [log in to unmask]<mailto:[log in to unmask]>
  Sent: Wednesday, January 11, 2006 10:17 AM
  Subject: [TN] Wire bondable gold pads


  Good Morning to all,
  We manufacture various circuits with electroplated wire bondable gold.
  As the final operation before packaging and shipping we plasma clean.
  Our customer is under the impression that the gold can contaminate
  during shipping and storage. My question is do other suppliers do
  special nitrogen/vacuum packaging of product like this to prevent this
  or is this something that should not be happening. Thanks in advance.
  Steve Kelly

  Steve Kelly
  PH: (416) 750-8433
  FAX: (416) 750-0016
  CELL: (416) 577-8433


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