Lee, Which statement are you referring to? There are two below: etchant causing break in trace and noticeable effects on multi-ghz boards. Scott, 10 and 25mil alumina is very common in microwave designs, giving a 50-ohm trace width of roughly 10 and 25mil, respectively. Sorry, couldn't help picking nits. -- Daniel From: "Lee Ritchey" <leeritchey@xxxxxxxxxxxxx> > This is another of those statements that are not true and should not be > repeated. Where did this one start? > > I use right angle bends in every signal, or rather, I allow them, even 2.4 > GB/S. > > How long will it take to get the misinformation purged from our profession? > > Lee W. Ritchey > Speeding Edge > P. O. Box 2194 > Glen Ellen, CA 95442 > Phone- 707-568-3983 > FAX- 707-568-3504 > > I just used the energy it took to be angry to write some blues. > Count Basie > > > > [Original Message] > > From: Andrew Ingraham <a.ingraham@xxxxxxxx> > > To: <si-list@xxxxxxxxxxxxx> > > Date: 8/30/2004 9:13:51 AM > > Subject: [SI-LIST] Re: 90 degree bend > > > > The other problem is that right-angle bends tend to concentrate etchant > and > > may result in over-etching the trace a bit in the corner. Presumably it > can > > lead to a break in the trace. > > > > For most of us, that's the reason why we don't use right-angle corners. > The > > electrical effects become noticeable if you're doing multi-GHz boards. > > > > Regards, > > Andy -- ___________________________________________________________ Sign-up for Ads Free at Mail.com http://promo.mail.com/adsfreejump.htm ------------------------------------------------------------------ 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: http://www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: http://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