There are a couple of problems: 1. Unbalanced construction 2. The top could be useless as a plane depending on what and how many parts are used. Best Regards, Steve. On 8/8/2012 11:21 AM, Jory McKinley wrote: > How about this: > > TOP/GND > SPLIT PWR1/2 > GND > SIG1 - SERDES / DDR2/High Speed Signals > SIG2 - DDR2 > GND > SIG3 - DDR2 > SIG4 - SERDES / DDR2/High SpeedSignals > GND/ISOLATED PWR (covered by bottom ground and no signal reference) > BOTTOM/GND > > > > > Jory McKinley > McKinley Consulting > e-mail: jory_mckinley@xxxxxxxxx > phone: (774)-285-2859 > ------------------------------------------------------------------------ > *From:* steve weir <weirsi@xxxxxxxxxx> > *To:* si-list@xxxxxxxxxxxxx > *Sent:* Wednesday, August 8, 2012 1:46 PM > *Subject:* [SI-LIST] Re: 10 Layer Stackup Recommendation for Board > with High speed Signals(SERDES/DDR) > > That stack-up could be in real trouble: Big cavities, plus lot's of > single-ended injection usually spells trouble. If you plan to route the > DDR2 Manhattan using L3 and L8 as a routing pair, then about your only > hope is if you forgo Power2 and make that also GND. Otherwise, > something will have to give. > > Steve > On 8/8/2012 6:32 AM, Prashanth Rajappan wrote: > > Hi All, > > I am looking for suggestions for our PCB which has high speed > interfaces like SERDES /DDR2/GIGA BIT Ethernet.The current stackup is > given below. > > > > Top > > GND > > SIG1 - SERDES / DDR2/High Speed Signals > > SIG2 - DDR2 > > POWER1 > > GND > > SIG3 - DDR2 > > SIG4 - SERDES / DDR2/High SpeedSignals > > POWER2 > > BOT > > > > PLease let me know your comments or suggestion regarding the same. > > > > Thank you in advance! > > > > > > Regards > > Prasanth > > > > ------------------------------------------------------------------ > > To unsubscribe from si-list: > > si-list-request@xxxxxxxxxxxxx <mailto: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 <mailto:si-list-request@xxxxxxxxxxxxx> > with 'help' in the Subject field > > > > > > List forum is accessible at: > > http://tech.groups.yahoo.com/group/si-list > > > > List archives are viewable at: > > //www.freelists.org/archives/si-list > > > > Old (prior to June 6, 2001) list archives are viewable at: > > http://www.qsl.net/wb6tpu > > > > > > > > > -- > Steve Weir > IPBLOX, LLC > 150 N. Center St. #211 > Reno, NV 89501 > www.ipblox.com <http://www.ipblox.com/> > > (775) 299-4236 Business > (866) 675-4630 Toll-free > (707) 780-1951 Fax > > All contents Copyright (c)2012 IPBLOX, LLC. All Rights Reserved. > This e-mail may contain confidential material. > If you are not the intended recipient, please destroy all records > and notify the sender. > > ------------------------------------------------------------------ > To unsubscribe from si-list: > si-list-request@xxxxxxxxxxxxx <mailto: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 <mailto:si-list-request@xxxxxxxxxxxxx> > with 'help' in the Subject field > > > List forum is accessible at: > http://tech.groups.yahoo.com/group/si-list > > List archives are viewable at: > //www.freelists.org/archives/si-list > > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > > > > -- Steve Weir IPBLOX, LLC 150 N. Center St. #211 Reno, NV 89501 www.ipblox.com (775) 299-4236 Business (866) 675-4630 Toll-free (707) 780-1951 Fax All contents Copyright (c)2012 IPBLOX, LLC. All Rights Reserved. This e-mail may contain confidential material. If you are not the intended recipient, please destroy all records and notify the sender. ------------------------------------------------------------------ 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 forum is accessible at: http://tech.groups.yahoo.com/group/si-list List archives are viewable at: //www.freelists.org/archives/si-list Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu