>-----Original Message-----
>From:  Kittel, H. James @ SLC
>Sent:  Wednesday, March 31, 1999 8:18 AM
>To:    [log in to unmask]
>Subject:       RE: [TN] Ni/Au "black pad" problem
>
>Paul,
>
>The 'removal' profile peaks at 220 deg C with profile repeat data varying +/-
>2 deg C.
>
>Absolute pad/ball temperatures are more difficult to measure because they are
>so dependant on the technique of attaching thermocouples and size of the
>thermocouples used.  There can also be a 10 degree temperature gradient
>across the BGA.  I feel certain I am within 10 degrees C of 220 deg maximum
>and probably within 5 degrees.
>
>Jim Kittel
>
>-----Original Message-----
>From:  [log in to unmask] [SMTP:[log in to unmask]]
>Sent:  Wednesday, March 31, 1999 7:26 AM
>To:    Kittel, H. James @ SLC; 'TechNet E-Mail Forum.'
>Subject:       RE: [TN] Ni/Au "black pad" problem
>
>Jim Kittel,
>
>What is the temperature setting and temperature variations of your
>Airvac hot nitrogen gas system?
>
>                               Paul Wilson
>               Plant Chemist  /  R&D Manager
>                  Circuit Center, Inc.
>                4738 Gateway Circle
>                 Dayton, OH 45440
>
>          Phone (937) 435-2131     Fax (937) 435-7698
>           http://www.circuitcenter.com

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