Ioan,
What John and the others were referring to is that the flux/solder paste
manufacturers have taken some of their no-clean products and given them
a little more "umph" for the reasons already stated. The question
remains HOW MUCH?
If we are talking about a good solder paste from a good supplier to
which very little has been added, then there should be no difference.
If we are talking about a good solder paste from a good supplier to
which more than a little has been added, then there had better be
testing!
If we are talking about a good solder paste from a good supplier to
which a whole pile (good chemical description) has been added, then you
had better be cleaning!
If we are talking about a solder paste from a crappy supplier what are
you thinking!
Bev
RIM
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Tempea, Ioan
Sent: January 9, 2007 12:18 PM
To: [log in to unmask]
Subject: Re: [TN] Cleaning
So Bev,
LF residues really are more reactive? You seem to have done some
measurements.
Thanks,
Ioan
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Bev Christian
Sent: Tuesday, January 09, 2007 12:12 PM
To: [log in to unmask]
Subject: Re: [TN] Cleaning
John,
Not if they do their homework and do the proper testing to show that the
tweak in reactivity won't put them on dangerous ground. That is why
there are tests like copper mirror, halide ion, British corrosion test,
SIR and electrochemical migration.
Bev
RIM
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of John Burke
Sent: January 9, 2007 12:02 PM
To: [log in to unmask]
Subject: Re: [TN] Cleaning
That's what I was thinking Brian...................8-)
With the change to lead free and the various "wetting" issues a lot of
people are using a more active flux if only to make the joints "look"
more
like 63/37 and as a result are having to use cleaning systems to remove
the
flux.
Of course the ones that do not remove the flux will find out eventually
why
they should have done!!
John
John Burke
(408) 515 4992
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