Hello again all, It's nice to have a name to it. Thanks for all the great information. My buddy and I here usually fill large open areas with solid planes stapled to the nearest power/ground plane. Pretty much to add another reference to signals on adjacent layers. So two more questions come to mind: 1. If we started making many-layered boards (8-10+), would these manufacturing considerations begin to out-weigh the electrical benifits? 2. Is copper thieving used on internal layers? Thanks again, -Bill ------------------------------------------------------------------ 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 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