Dave, Check for IPC-7351, the courtyard is what you need. Download the free landpattern calculator or viewer from www.pcbmatrix.com and look for this info. 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 : Dave Pollum [mailto:[log in to unmask]] Envoyé : Wednesday, October 14, 2009 10:25 AM À : [log in to unmask] Objet : [DC] clearance between SMD devices I've tired to find out how much clearance is required between SMD parts such as 0603, 0805, and SOT23 parts. For example, if I have 2 0603 resistors side by side, what's the minimum distance between the resistors? Are there rules of thumb or IPC rules? How accurately can SMD parts be placed by machine? I've asked an assembly house, but didn't get an answer. I'm looking for typical values. -Dave Pollum --------------------------------------------------------------------------------- DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF DesignerCouncil. To temporarily stop/(restart) delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL/(MAIL) Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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 --------------------------------------------------------------------------------- --------------------------------------------------------------------------------- DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF DesignerCouncil. To temporarily stop/(restart) delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL/(MAIL) Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail 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 ---------------------------------------------------------------------------------