[SI-LIST] layer stackup assignment
- From: Jie Wang <jie_wang_2009@xxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Wed, 11 Mar 2009 11:10:14 -0700 (PDT)
All,
For a 4-layer substrate package, if we assign the top layer
as signal layer, the second and third layer would be Power and Ground
planes. We have VDD/VSS and AVDD/AVSS, so we have to split the second
and third layer for these two pairs of power and ground.
It would have two options:
Option 1. In second layer: two third of area as VDD, one third of area as
AVSS,
then in third layer: two third of area underneath of VDD is assigned as VSS,
the rest area -AVDD.
Option 2. In Second layer, two third of area as VSS, one third of area --AVDD,
then third layer would be: two third of area underneath of VSS is assigned as
VDD, the rest area --AVSS.
My question is:
Do both option work? Which option is better than the other?
Thanks,
Jie
__________________________________________________________________
Be smarter than spam. See how smart SpamGuard is at giving junk email the boot
with the All-new Yahoo! Mail. Click on Options in Mail and switch to New Mail
today or register for free at http://mail.yahoo.ca
------------------------------------------------------------------
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 technical documents are available at:
http://www.si-list.net
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:
