Take some samples and send them out to your solder paste supplier.
They should be able to confirm it's from their paste or at least
identify what it is.

Rich K / KEDS
260.925.8719
 
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Kane, Amol (349)
Sent: Tuesday, April 11, 2006 11:46 AM
To: [log in to unmask]
Subject: [TN] White Residue in the oven

Hi Technetters,
I have a white residue coating all over my reflow oven innards (almost
looks like white fungus). How can I absolutely be certain that it's flux
and not anything else?are there any tests available for this? I am
planning to check the oven exhaust for correct air flow
rates.....anything else I should be looking out for?. We are using a
water soluble halide free flux and SnPb solder

Thanks in advance

Amol Kane
M.S (Industrial Eng.)
Process Engineer
Harvard Custom Manufacturing 
941 Route 38  Owego, NY 13827
Phone: (607) 687-7669 x349
[log in to unmask]

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