Big snip > > Shortly 2.5D is another name of planar structures to me. > > Regards, > > Mick > > Yes, and while it seemed cute at the time it does cause confusion. One alternative classification is "3D mostly planar", to emphasize we are solving for fields in 3D but the geometry is planar with some vias also. But its really just about the type of geometry you are trying to solve, not some esoteric fractional geometry mathematics. Dan Dan Swanson EMAIL: d.swanson@xxxxxxxx Forem USA PHONE: 978-834-4085 37 South Hunt Road FAX: 978-388-7077 Amesbury, MA 01913 ------------------------------------------------------------------ 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