[SI-LIST] Re: Intel Motherboard with DDR2
- From: <Aubrey_Sparkman@xxxxxxxx>
- To: <Chris.Cheng@xxxxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Tue, 22 Feb 2005 11:40:29 -0600
Chris,
You are correct, there was no recommendation in that presentation to
have
1/2 oz signal and 2 oz power plane on the other side. That was just my
EXTREME example to highlight the difference between your response and
Jon's comment. A balanced stackup could be made with very un-balanced
cores.
Intel's stackup was well balanced with respect to both cores and overall
stackup.
Aubrey Sparkman=20
Enterprise Engineering Signal Integrity Team
Dell, Inc.=20
Aubrey_Sparkman@xxxxxxxx=20
(512) 723-3592
-----Original Message-----
From: Chris Cheng [mailto:Chris.Cheng@xxxxxxxxxxxx]=20
Sent: Tuesday, February 22, 2005 11:35 AM
To: Sparkman, Aubrey; Chris Cheng; 'si-list@xxxxxxxxxxxxx '
Subject: RE: [SI-LIST] Re: Intel Motherboard with DDR2
Aubrey,
I don't think there was any recommendationin in that presentation to
have
1/2 oz signal and 2 oz power plane on the other side. Did I missed
anything ?
-----Original Message-----
From: Aubrey_Sparkman@xxxxxxxx
To: Chris.Cheng@xxxxxxxxxxxx; si-list@xxxxxxxxxxxxx
Sent: 2/22/2005 8:21 AM
Subject: RE: [SI-LIST] Re: Intel Motherboard with DDR2
Chris,
Jon said " balanced ***cores*** (S-S or plane-plane)"
He did not say balanced stackups. Both must be considered in
production. Severely unbalanced ***cores*** (such as one with a 2 oz
reference plane on one side and a HALF oz signal layer on the other
side) will warp like a potato chip suffer yield problems BEFORE it gets
to the step where all the cores are combined.
Aubrey Sparkman
Enterprise Engineering Signal Integrity Team Dell, Inc.=20
Aubrey_Sparkman@xxxxxxxx
(512) 723-3592
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List FAQ wiki page is located at:
http://si-list.org/wiki/wiki.pl?Si-List_FAQ
List technical documents are available at:
http://www.si-list.org
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
