A simple Google search of the words "trace resistance" yields over 4 million hits and the first page should be sufficient enough to answer your question. Craig Sullivan Process Engineering Impedance/Electrical Test Sanmina-SCI - Owego Division Chair - IPC D-21c Controlled Impedance Task Group (607)689-5225 mailto:[log in to unmask] -----Original Message----- From: Ralph Richart [mailto:[log in to unmask]] Sent: Wednesday, January 25, 2006 10:10 PM To: [log in to unmask] Subject: [TN] Trace Resistance Can anyone point me in the right direction to estimate what trace resistance should be along a circuit (on a printed circuit board)? Is there a model for this (trace width, height and length)? What other considerations would affect resistance along a trace? Does material selection and surface finish also play a part? Thanks for your input... --------------------------------------------------- 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 ----------------------------------------------------- Ralph ____________________________________________________________________________ _ Scanned by Sanmina-SCI eShield ____________________________________________________________________________ _ _____________________________________________________________________________ --------------------------------------------------- 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 ----------------------------------------------------- Scanned by Sanmina-SCI eShield _____________________________________________________________________________