Hi Cedric. Our basic guidelines for 210um (0.0084") thick copper is .0.018" minimum for both line widths and spacing. One must also take into consideration factors such as temperature rise, enclosure environment, etc. Keep in mind that you are also plating inside your through holes, so you must compensate here as well. I am not aware of an IPC specification for heavy copper. We invested a considerable amount to develop our guidelines. Tom Kemp Rockwell Collins Printed Circuits Sr QE Cedric ORAIN <[log in to unmask]> Sent by: TechNet <[log in to unmask]> 06/08/2010 05:45 AM Please respond to TechNet E-Mail Forum <[log in to unmask]>; Please respond to Cedric ORAIN <[log in to unmask]> To [log in to unmask] cc Subject [TN] hEAVY COPPER PCB DESIGN RULES Hello Technetters, I am looking for design rules regarding a 2 sided PCB having 210um of finished copper. What are the minimum trace width and the minimum clearance betweens traces? Is ther an IPC doc describing this? Thanks for your answers in advance! Sincerly, Cedric ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- 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 ----------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- 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 -----------------------------------------------------