There shouldn't be any electrical issues but there are a few thermal details. Basically, you will have to make sure you have adequate thermal reliefs at plane connections, because with twice the copper thickness any given size relief will heat sink twice as well. This becomes a solderability and rework issue. I presume the extra thickness is just for the internal power and ground planes. It wouldn't help to use it in a signal layer. Orin Laney Have you calculated the On Sun, 15 Jul 2007 08:48:50 -0700 (PDT) sunil bharadwaz <sunil_bharadwaz@xxxxxxxxx> writes: > Hi Experts , > I have been doing mixed signal boards , Digital , Analog & RF .RF up > to > 5 Ghz.No big issues so far. > > We are planning to do similar kind of boards with a new SOC.There is > > a concern regarding the IR drop as most of the permissible margins > are > eaten away at the package & chip levels. > > To mitigate this effect to a larger extent , the plan is to use 2 > Ounce & > higher levels of Cu thickness.So far we have been doing the mixed > signal > boards with Cu thickness of 1 Oz. > > Could there be any issues with this approach for the mixed signal > boards ? > > Appreciate any inputs in this regards. > > Best Regards > Sunil.B > > > > > --------------------------------- > The fish are biting. > Get more visitors on your site using Yahoo! Search Marketing. > > ------------------------------------------------------------------ > 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 > > > > ------------------------------------------------------------------ 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