When you are seeing spikes on wave solder there are a number of
things to consider.
1. Is the boards being fluxed correctly and is the
temperature profile correct.
2. Could the dwell time in the solder be too
long.
3. If the spikes are on one component it may be worth checking the
solderability.
It is unlikely that the copper content in the solder will
be too high as the rate at which copper dissolves in solder reduces as the
copper content increases so at normal operating temperatures it tends to be self
regulating. However, you should be doing regular checks on your solder
anyway to be sure!
Regards,
Neil
Neil
Atkinson
-----Original Message-----
From:
Bev Christian [mailto:[log in to unmask]]
Sent: 27
February 2002 23:35
Subject: Re: Solder Projections
Mr.
Pollak,
High copper content in your solder can cause spikes... or amateur
hand
solderers like myself are very good at forming spikes. There may
be other
reasons that some of our "older" regulars can contribute.
I
looked in IPC/EIA J-STD-006 and it lists max impurity levels for
different
elements, but does not give reasons why they are individually
considered
impurities. You may be able to find this info from some of
the more common
reference books for our industry, the titles of which you can
find by doing
a search of the TechNet archives from the IPC
homepage.
regards,
Bev Christian
Research in
Motion
-----Original Message-----
From: Mr. Leslie A. Pollak [mailto:[log in to unmask]]
Sent:
February 27, 2002 3:57 PM
To: [log in to unmask]
Subject: [TN] Solder
Projections
Hi,
Could soemone tell me what causes solder
projections or what we call
icicles.
Or point us to IPC documentation
that would help us.
Thanks
Mr. Leslie A.
Pollak
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