Hi Adrian! Is this part a Texas Instrument part that has a big metal heat slug in the top? I've seen this happen with that part because of the weight of the heat slug...the balls look kinda "squished" too... -Steve Gregory- > Hi Technetters, > > Can anyone help me? > > We are curently running some BGA'S through reflow, and on inspecting them > through our Ersascope BGA inspection system have measured there is a ball > drop of around 30% from original ball size. The actual ball formation looks > very "border line" as in, has it single or double dropped. Does anyone know > the guidlines for such a drop? Is 30% the bottom end tolerance and if so > should I be looking at a drop of + 30% to insure a good looking sound joint > on the BGA. > > Many thanks in advance, > > Adrian Hanks. >