All you need is to say 'Thank you' to Tom Buck at DDI.
His paper tells you ALL about what you're asking for.
http://www.smta.org/files/SMTA_Boston_pbfree_ddi.pdf
By the way, why do you ask?
Inge
-----Ursprungligt meddelande-----
Från: TechNet [mailto:[log in to unmask]] För David Tremmel
Skickat: den 8 juni 2007 21:13
Till: [log in to unmask]
Ämne: [TN] Z-axis expansion
Hello,
I have seen comments regarding z-axis expansion that boards and
components
experience during reflow; would any of the gurus care to give some
numbers?
Such as the copper in the vias has such-and-such expansion versus a High
Tg
FR4 which has such-and-such z-axis expansion. (I am sure someone is
going
to correct me because I did not use the correct terms).
Thank you in advance,
David Tremmel
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