Yes, the layers are numbered 1. - 10. Steve. Moody, Emory wrote: > So I am understanding correctly, this is for 10 layer stack up? > > Emory Moody > Sr. Recruiter > > SourceRight Solutions > (Partnering with Intel Corporation) > > Talent Acquisition Outsourcing > MSP * RPO * Professional Contingent Workforce Services > > 925 North Point Pkwy, Suite 100 > Alpharetta, GA 30005 > > Tel 336-674-9353 > emorymoody@xxxxxxxxxxxxxxx > > -----Original Message----- > From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On > Behalf Of steve weir > Sent: Thursday, May 13, 2010 3:35 PM > To: Jaison Fernandez > Cc: si-list@xxxxxxxxxxxxx > Subject: [SI-LIST] Re: 10 Layer PCB Stack-up > > Jaison, your stack-up will have poor impedance control and substantial > cross-talk between L1 and L2, and L9 and L10. It is also unbalanced > which makes it susceptible to warpage. Depending on your power > requirements, an alternate 10 layer would be: > > 1. S1 > 2. Gnd > 3. S2 > thick dielectric > 4. S3 - low edge rate / frequency > 5. Power > dielectric 3-4 mils > 6. Gnd > 7. S4 > thick dielectric to match L3/L4 > 8. S5 > 9. Gnd > 10. S6. > > This gives you good impedance control, and Gnd referencing on S1, S2, > S4, S5, and S6. The disadvantage is the long Z axis run to the power > cavity which will require more bypass caps to compensate. That assumes > that the Z axis inductance isn't so high that they can't. If the power > distribution needs to be near the top for Z axis inductance, you will > either need to come up with enough Cu on L1, and/or L3 to make that > work, go to 12 layer construction, or lose signal layers. > > Steve. > > Jaison Fernandez wrote: > >> Dear All, >> Currently I am working on a board which contains ATMEL AT91SAM9M10, 128MB >> SDRAM (166MHz), GPS Chip solution, High current motor Drivers etc. >> >> I got a 10 Layer reference stack up from team my team as follows: >> >> 1. Top - Signal 1 (Low frequency) >> ------------------------- >> 2. Signal 2 (Low frequency) >> ------------------------- >> 3. GND 1(Plane) >> ------------------------- >> 4. Power 1 (Plane) >> ------------------------- >> 5. GND 2 (Plane) >> ------------------------- >> 6. Signal 3 (High Frequency) >> ------------------------- >> 7. Signal 4 (High Frequency) >> ------------------------- >> 8. GND 3 (Plane) >> ------------------------- >> 9. Signal 5 (Low frequency) >> ------------------------- >> 10. Bottom Signal 6 (Low frequency) >> ------------------------- >> >> My major intention is to reduce the radiated emission so that my GPS Chip >> solution using passive antenna should work with out any interference from >> other sections of my board it's self. >> >> Also we need to pass the EMI/EMC tests. >> >> When I refer regarding layer stack up in internet what I can found is all >> signal layers are followed by a immediate reference plane. >> >> Is my above layer stack up is ok for my requirements? >> Experts suggest please... >> >> Regards, >> Jaison Fernandez >> >> >> >> ------------------------------------------------------------------ >> 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 >> >> 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 > > > ------------------------------------------------------------------ > 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 > > 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 ------------------------------------------------------------------ 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 Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu