Hi Tamir,

The 5 mil trace is a bit small for a power connection to a capacitor for my
liking.  I am assuming that this is a decoupling capacitor you are talking
about.  The important feature of a decoupling capacitor connection is low
inductance.  That means a short, fat trace.  If you are connecting to a via,
consider using a 12-15 mil trace.  If you are connecting to a pad of a
surface mount IC, consider using 7-10 mils.

If you use the 12-15 mil traces I suggested above, be aware that this robs
heat from the capacitor pad during reflow and could cause tombstoning.  One
way around this is use the same trace pattern on both terminals of the
capacitor so they both heat at a similar rate.

Regards,

Seth Goodman
Goodman Associates
7687 Leta Way
Verona, WI 53593
tel    (608)833-9933
fax    (608)833-9966
mobile (608)213-8533


> -----Original Message-----
> From:
> Sent: Tuesday, February 27, 2001 9:16 AM
> Subject: [TN] Trace width for VCC
>
>
>
> Hello,
> Can any one suggest if it allow working with 5 mil trace width for
> connecting VCC (3V) to capacitor?
> Thanks, Tamir B. Shoshan

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