Dave, The 10% rule won't get you far. You want to purchase IPC-7525A. Regards, Ioan Tempea, ing. t : 450-967-7100 ext : 244 [log in to unmask] www.digico.cc P N'imprimer que si nécessaire - Print only if you must -----Message d'origine----- De : TechNet [mailto:[log in to unmask]] De la part de Dave Connitt Envoyé : 7 janvier 2009 06:59 À : [log in to unmask] Objet : [TN] Solder Paste Stencil Guidelines Hello, Does anyone know of a current standard for the generation of solder paste stencil apertures? I know the general rule is 10% less than the copper pad. We use PCB Libraries design guides here for all our symbol generation but I don't think it supports "window paning" or "home plate" type apertures. We currently have been leaving the special aperture generation up to our stencil vendor and review the results prior to release for manufacture. There has been some talk here about incorporating those apertures in the actual PADS PCB file which is why I am asking about standards. Thanks, Dave Connitt CID+ Printed Circuit Designer L3 Fuzing & Ordnance Systems A Wholly Owned Subsidiary of: L3 Communications 3975 McMann Road Cincinnati, Ohio 45245 Ph. 513- 943-2010 Fax 513-943-2288 --------------------------------------------------- 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 -----------------------------------------------------