On Feb 28, 2011, at 1:11 PM, M. Adam Davis wrote:

> I'm comfortable working with LQFPs down to 0.4mm pitch
>
> The LPC1100 comes in an lqfp 48,

I was looking at their "low pin count" LPC1102, which comes in a 16pin =20
BGA (0.5mm pitch.)  What kind of design rules does one need to make a =20
proper PCB for that kind of package?  Can you cheat, since there are =20
only the four "internal" balls?  (except for them, it looks sorta like =20
a 12pin LCC package, which I'd be willing to attempt.)

For comparison, I usually try to make 0.5mm be my smallest drill...

BillW

--=20
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