Hi Vicka! Here are the numbers my references have: For Acid copper 1.70-1.82 microohm-cm For Pyrophosphate copper 1.73-1.75 microohm-cm The specific bath chemistry and additives seem to push the resistivity values around. Good Luck. Dave Hillman Rockwell Collins [log in to unmask] "White, Vicka (AZ75)" <vicka.white@HONE To YWELL.COM> [log in to unmask] Sent by: TechNet cc <[log in to unmask]> Subject [TN] Resistivity of plated copper 12/07/2005 02:59 PM Please respond to TechNet E-Mail Forum <[log in to unmask]> ; Please respond to "White, Vicka (AZ75)" <vicka.white@HONE YWELL.COM> Does anyone have accurate information of the resistivity of plated copper as compared to copper foil? I have done some research and found that there are a lot of conflicting statements out there. I have seen it published anywhere from plated copper being 4.8 to 6 uohm cm. Vicka White PWB Technology Honeywell - Phoenix Email: [log in to unmask] Phone: 602-436-1467 FAX: 602-436-2252 Pager: 602-238-8274 --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 -----------------------------------------------------