[SI-LIST] Layer Stackup
- From: david.kaushansky@xxxxxxxxxxxx
- To: si-list@xxxxxxxxxxxxx
- Date: Wed, 7 Jan 2004 09:40:05 -0500
The design I am working has a fairly dense placement. To try minimize my
time in artwork, I would like to add as many routing layers as possible to
my layer stackup. I was thinking of using an 18 layer board of Nelco
4000-13, with the following stackup:
Signal1
GND
Signal2
Signal3
PWR
Signal4
Signal5
GND
Signal6
Signal7
GND
Signal8
Signal9
PWR
Signal10
Signal11
GND
Signal12
The skinniest dielectric thickness is 4 mils, all signal layers are 0.5 Oz
copper and plane layers are 1 Oz copper. The fastest signals are 100MHz,
with rise times in 500ps range.
My primary concern is the ratio of 6:12 of plane layers to signal layers.
I usually try to design for a ratio of about 8:10 or 9:9. I know I will
have to be very careful about crosstalk on adjacent layers, but other than
that, what else should I be concerned about?
Thanks
Dave
------------------------------------------------------------------
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.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:
