Jim,
Not really an answer, but I am curious to this directive??? Do you have any
idea why the Air Force would disallow such no-clean products. I would have
thought it was more of an issue that some contractors are applying very
aggressive rosin based fluxes to their boards, to the point of having to
clean the residues off. I am a firm believer in no-clean products, I have
always used no-clean wave solder fluxes, and re-work fluxes, and I would
never even consider using fluxes that require cleaning. Our process window
fits the no-clean directive, and I am experiencing perfect solder results.
Surely, the situation of applying possibly corrosive fluxes to a board and
then having to clean these boards would pose more of a threat to
military/air force applications????
Curious,
Mike
-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]]
Sent: Wednesday, 27 February 2002 07:51
To: [log in to unmask]
Subject: Re: [TN] No No-clean?
Jim Jenkins nervously writes:
I was just approached by one of our engineers whose customer told her that
the Air Force has issued a directive disallowing the use of no-clean fluxes
on any of their hardware. The customer is flowing down that requirement to
us. Do any of you know of this directive or what they could be referring
to?
Doug Pauls, ever calm and collected, responds.
Jim, this is the first I have heard of anything along these lines and we
build LOTS of stuff for the Air Force. On the other hand, we clean our
hardware, so they may not feel the need to talk to us on this issue. I
would think that levying such a requirement on *existing* hardware would be
next to impossible since you affect thousands of contracts. You might want
to determine if this is a requirement for NEW designs. Since many
companies do manufactur hi-rel equipment with no-clean processes, I would
be curious as to the technical rationale for such a requirement.
Doug Pauls
Rockwell Collins
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