Thanks!
Lee
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Boris Bakshan
Sent: Tuesday, November 3, 2015 12:07 PM
To: leeritchey@xxxxxxxxxxxxx
Cc: Kevin.Hou@xxxxxxxxxx; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: What's the purpose of stitching vias which just
connect one GND layer?
Best answer so far on the SI-list ! :)
On Tue, Nov 3, 2015 at 9:51 PM, Lee Ritchey <leeritchey@xxxxxxxxxxxxx>
wrote:
Those stitching vias keep the CAD department busy and raise the costCaveat and Virus Alert:
of the PCB. Not much else.
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]
On
Behalf Of Kevin Hou
Sent: Monday, November 2, 2015 9:30 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] What's the purpose of stitching vias which just
connect one GND layer?
Hi Guru:
I found one interesting thing on Intel 6-layer(S-VCC-S-S-GND-S) CRB
about the stitching via.
There are pairs of stitching GND via put around the differential
signals(PCIe gen3) transited from TOP to BOTTOM layer.
The differential signal is VCC reference on the TOP layer and GND
reference on the BOTTOM layer.
My understanding for the stitching via is to provide the return path
(GND reference transited to another GND reference) But in the Intel
CRB I had on hand, these stitching vias are only connected to one GND
layer. What's the purpose?
Using capacitor to connect VCC/GND will be better, right?
Best Regards,
Kevin Hou
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