Hi Dennis,
Dennis Saputelli wrote:
for your .8mm BGA what trace line width and air gap do you use?
~0.1mm trace for signals, 0.2mm trace for power pins. Most of the signal lines get impedance matched. Depends on design requirements and stack-up. Minimum clearance is usually 0.1mm, again depends on design.
what ball pad size?
Have different components, from 0.3mm (+/- 0.05mm) to 0.5mm (+/- 0.05mm) ball sizes. Pad is derived from there, according to upcoming IPC-7351 standard.
what via dia and via hole ?
0.25mm hole and 0.45mm capture pad in dense places, larger holes/pads everywhere else.
Indrek
-- Indrek Rebane | Borthwick-Pignon Electronics Engineer | Tartu Science Park Phone: (+372) 7 302 641 | Riia 185, 51014 Tartu Fax: (+372) 7 383 041 | Estonia [EMAIL PROTECTED] | www.bps.co.ee
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