Yes but given that the stuff has been on some components for ever, how
justified is the concern? Do reflowed components, as opposed to as
supplied, whisker and if they do is it significant? One of the ways to
reduce whiskering is thought to be to "anneal" the as deposited coating,
which will happen on the areas not exposed to paste during reflow
soldering. Those areas that are soldered (In wave all outward faces)
will not be pure tin any more.
Regards
Mike
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bev Christian
Sent: Wednesday, December 10, 2003 5:50 PM
To: [log in to unmask]
Subject: Re: [TN] Components Suppliers who are using Tin Finishes
Ken,
Simple: its cheap and solders well. Problems down the road? "Hey not
our concern." Ah, life is beautiful on the way to the bank. Bev
Christian Research in Motion
-----Original Message-----
From: Bloomquist, Ken [mailto:[log in to unmask]]
Sent: December 10, 2003 12:39 PM
To: [log in to unmask]
Subject: Re: [TN] Components Suppliers who are using Tin Finishes
I have another question along this same subject line.
If everyone is going nuts over "Tin Whiskers" why are the component
manufacturers using tin as an alternative finish to tin/lead? Almost
every stone you turn over, regarding going lead free, you find an
article on "Tin Whiskers". Why not switch to something else that the
industry is not having trouble with???
Ken Bloomquist
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