[SI-LIST] Re: Routing 10G differential lines over Standard FR-4
- From: "Nick Langston" <nicksr@xxxxxxxxxx>
- To: <sunil.mekad@xxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Mon, 16 May 2005 08:15:38 -0700
Sunil,
At 10Gb/s in FR4, you'll degrade the Tr about 10ps per inch of travel. I
think Eric Bogatin says if you degrade your Tr by 30% you will need to
depend on equalization to recover your signal.
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of sunil.mekad@xxxxxxxxx
Sent: Monday, May 16, 2005 4:34 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Routing 10G differential lines over Standard FR-4
Hi Everyone,
I was planning to route high speed differential traces 10Gbps over
standard FR-4 material. Can anyone suggest which FR-4 material can be
used (Nelco N4000-6 or Rogers RO4350)? Is it possible to do use standard
FR-4 without compromising signal quality.
Also is it recommended to route these traces over microstrip rather than
striplines traces? If I route it over stripline then it would require
vias to be put on every pair of these differential traces .. I am not
too comfortable doing that!!
Can anyone tell what can be done? Thanks in anticipation,
Regards,
Sunil
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