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 [signature002]<http://www.digico.cc/> 950 RUE BERGAR, LAVAL, QC, H7L 5A1<http://g.co/maps/2gh3f> T+ 1 (450) 967-7100, EXT244 ------------------------------------------------------------------------ [signature001] <http://www.facebook.com/pages/Digico/277076778479> ------------------------------------------------------------------------ Lauréat Dunamis 2012<http://digico.cc/dunamis-2012/> Entreprise manufacturière / Gestion du capital humain ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________