[time-nuts] RoHS Solder
SAIDJACK at aol.com
SAIDJACK at aol.com
Thu Sep 24 22:24:54 UTC 2009
Hi,
yes, tin whiskering is a huge issue. Wikipedia has some nice (and
shocking) pics on it.
One of the best sources of information is the Nasa Tin Whisker page:
_http://nepp.nasa.gov/whisker/_ (http://nepp.nasa.gov/whisker/)
bye,
Said
In a message dated 9/24/2009 06:15:04 Pacific Daylight Time,
wpxs472 at gmail.com writes:
Interesting comments regarding. lead free solder. I was not aware of the
tin
whisker problem. We went lead free here at work several years ago. I really
don't like the lead free solder we have to use on several accounts. As
mentioned, you don't get nice shiny joints. They look pretty much like cold
joints. We had to do some rework on some products and the lead free stuff
doesn't rework well at all. We ended up having several field failures. Not
good for customer relations. The processing temperatures are much higher
than with eutectic and sometimes the boards come out of the oven all brown
and crispy. Good thing most of what we make gets molded in plastic. I don't
use lead free in the lab. One of the many reasons is to keep customers from
putting engineering samples in equipment to be sold.
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