Hi Gary, Diodes and transistors have been an issue for years. My recommendation for diodes and transistors is to use alpha pin numbers in place of the numerics. It's much easier to map a part to A and C as opposed to 1 and 2 ( or EBC, rather than 1,2,3). This can cause extra parts in the library but it typically solves the pinout issue. -Al Onderick Gary Bremer <[log in to unmask]> Sent by: TechNet <[log in to unmask]> 03/27/2007 11:47 PM Please respond to TechNet E-Mail Forum <[log in to unmask]>; Please respond to Gary Bremer <[log in to unmask]> To [log in to unmask] cc Subject [TN] Footprint standards for Polarized components (Diodes) Steve Please post this picture on your web site. The Diode D116 pin 1 is represented by a white dot which is also the anode. I tried to tell the designers that the bar on the silk screen represents the cathode they would not listen so I wound up with major rework to correct all the misplaced (reversed) components. I was just call to the production line for yet another problem with F31 again footprint problems. This is why I asked the question if there exist a standard for creation of component foot prints. I do appreaciate all of your replies some have been most enlightening and will be passing this information along to the boards designers. Gary Bremer Manufacturing Engineer CIT - CID _________________________________________________________________ Exercise your brain! Try Flexicon. http://games.msn.com/en/flexicon/default.htm?icid=flexicon_hmemailtaglinemarch07 --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------