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It depends : ball size and alloy type (Sn/Pb or lead free like SAC?)
For instance: Plastic BGA 27 mm square, 1,27 mm ball pitch, Sn63Pb37 Balls,
the collapsing effect is about < 0,2 mm
Regards
Gabriele
-----Messaggio originale-----
Da: TechNet [mailto:[log in to unmask]] Per conto di Ioan Tempea
Inviato: lunedì 29 ottobre 2012 15.32
A: [log in to unmask]
Oggetto: [TN] Collapsed height for BGAs
Dear Technos,
For heatsink attachment purposes, is there any way of knowing what the
collapsed height of BGA balls will be after soldering? Best would be to
measure, but I don't have the products and, anyways, the population of
boards was rather scarce.
Thanks,
Ioan Tempea, ing.
Ingénieur principal de fabrication / Senior Manufacturing Engineer
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950 RUE BERGAR, LAVAL, QC, H7L 5A1<http://g.co/maps/2gh3f>
T+ 1 (450) 967-7100, EXT244
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Entreprise manufacturière / Gestion du capital humain
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