sorry i was thinking something and writing something else, its a miracle some boards come out working.;) "Austin Franklin" <austin@xxxxxxxxxxxx> wrote: >Hi, > >FR-4 is fine for your specs below. I have FR-4 boards that run Infiniband >4x (2.5GHz x 4 signal lanes), and no problem. That's the highest I've gone >on FR-4. I do suggest you do simulation though, and you pay careful >attention to routing rules. > >BTW, 1GHz better have better than a 9ns edge rate, or you won't get any >signal ;-) > >Austin > > >> -----Original Message----- >> From: sjcharles@xxxxxxx [mailto:sjcharles@xxxxxxx] >> Sent: Friday, February 18, 2005 11:37 AM >> To: icu-pcb-forum@xxxxxxxxxxxxx >> Subject: [PCB_FORUM] Re: high speed board material. >> >> >> speed 1 ghz, 8 ly, 1/2 oz, rate edge approx 9n, 5/5 width and >> spacing maybe 4 >> for necking. two or threes pair controlled Z. If Fr4 will do the >> job then i that >> would be fine. >> >> thanks > > >----------------------------------------------------------- >To subscribe/unsubscribe: > Send a message to icu-pcb-forum-request@xxxxxxxxxxxxx > with a subject of subscribe or unsubscribe > >To view the archives of this list please login at >//www.freelists.org. Our list name is icu-pcb-forum >or go to //www.freelists.org/archives/icu-pcb-forum/ > >Problems or Questions: > Send an email to icu-pcb-forum-admins@xxxxxxxxxxxxx > >Want to post a job listing ? DON'T DO IT HERE! >Better yet, join our jobs listing forum. > >SUBSCRIBE: icu-jobs-forum-subscribe@xxxxxxxxxx >POST: icu-jobs-forum@xxxxxxxxxx >----------------------------------------------------------- > __________________________________________________________________ Switch to Netscape Internet Service. As low as $9.95 a month -- Sign up today at http://isp.netscape.com/register Netscape. Just the Net You Need. New! Netscape Toolbar for Internet Explorer Search from anywhere on the Web and block those annoying pop-ups. Download now at http://channels.netscape.com/ns/search/install.jsp ----------------------------------------------------------- To subscribe/unsubscribe: Send a message to icu-pcb-forum-request@xxxxxxxxxxxxx with a subject of subscribe or unsubscribe To view the archives of this list please login at //www.freelists.org. Our list name is icu-pcb-forum or go to //www.freelists.org/archives/icu-pcb-forum/ Problems or Questions: Send an email to icu-pcb-forum-admins@xxxxxxxxxxxxx Want to post a job listing ? DON'T DO IT HERE! Better yet, join our jobs listing forum. SUBSCRIBE: icu-jobs-forum-subscribe@xxxxxxxxxx POST: icu-jobs-forum@xxxxxxxxxx -----------------------------------------------------------