Hello, no problem to use flex material for high speed applications. You have to choose a flex material without adhesive, e.g. DuPont Pyralux AP or similar. This link may be helpful: http://www2.dupont.com/Pyralux/en_US/uses_apps/computer/cs_comp_flex_b.html Best regards Simon Charming Chan wrote: > Hello All, > > > > Now I'm working on a pcb design project, two rigid pcb boards > are connected with high speed connector. I have an idea to > make the two pcb boards connected with flex instead of the > expensive high speed connector. So, my concern is, the flex > part?is capable to?transmit high speed more than 6GHz? Thank you all. > > > > Best Regards > > Charming Chan > --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------