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.
>