FreeLists / si-list / [SI-LIST] Re: remove non-functional pads: any improvementbeseen

["Abe Riazi" <ariazi@xxxxxxxxxxxxxxx>]

Removing the unused via pads in power/ground planes can prove beneficial by 
reducing
the parasitic capacitance.  This effect can be quantified analytically (for 
example see
my article, " Via Modeling for High-Speed Simulations, Part 2 ",  in PCD&M, 
Oct. 2003,
PP. 38-40").

Regards,

Abe Riazi
ServerWorks
-----Original Message-----
From:   lin-wl_wang@xxxxxxxxxxx [SMTP:lin-wl_wang@xxxxxxxxxxx]
Sent:   Sunday, April 04, 2004 7:13 PM
To:     si-list@xxxxxxxxxxxxx
Cc:     lin-wl_wang@xxxxxxxxxxx
Subject:        [SI-LIST] Re: remove non-functional pads: any improvement beseen


Thanks to all who responded!

I checked with PCB fabricator again. They can easily delete all unused =
pads, but it would be time-consuming to selectively delete some of them.

Just curious, do you always choose to remove non-functional pads for GHz =
signal lines? And How much improvement have you seen?

Thanks!
-WL
  

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