[SI-LIST] Re: Antipad dimensions
- From: "Landau, Yoni" <yoni.landau@xxxxxxxxx>
- To: Karthik Raj Guruchandran <karthik.guruchandran@xxxxxxxxx>
- Date: Mon, 8 Mar 2010 22:50:06 +0200
Hi Karthik,
I don't know if this is the most important factor but we have seen in our
designs that
the clearance on the GND layers above and below the signal traces caused by the
via clearances can drastically impact signal integrity.
These clearances impact the returning current path on the GND layers and change
the characteristic impedance of the signal traces.
At high freq this can impact your signal integrity.
Thanks, Yoni
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Karthik Raj Guruchandran
Sent: Monday, March 08, 2010 7:16 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Antipad dimensions
Hello all,
What would you consider to be the most important factors that would have an
impact on antipad clearance dimension (in vias), apart from fabricators
capability? In other words, what do we need to consider to determine antipad
clearance dimension?
I am trying to put together an article on the effect of antipad dimensions
on energy transfer (by looking at s-parameters) and see some interesting
simulation results.
Thanks,
Karthik
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