BLM - Although I couldn't find it in the new IPC-SM-782 (Surface Mount Land Patterns), the old, original version of 782 (March 1987) had the spacing at 0.025" (0.63mm), via pad to smt pad on page 65. Ed/ Ed Valentine Electronics Manufacturing Solutions 8612 Mourning Dove Road, Raleigh, NC 27615 Phone: (919) 270-5145, Fax: (919) 847-9971 Email: [log in to unmask] Website: http://www.ems-consulting.com ----- Original Message ----- From: Brad L. Matthies <[log in to unmask]> To: <[log in to unmask]> Sent: Friday, March 31, 2000 1:27 PM Subject: [TN] Via Hole Placement. > TN, > > We are experiencing some manufacturing problems (solder bridging) and > have linked them to via hole placement. The particular assembly we are > manufacturing has multiple via holes that are within approximately 15 > Mils of SMT lands. Does anyone have a resource that spells out safe > distances of via holes to SMT lands that they can pass along? We are > getting ready to approach the design group for this product and are > looking for a qualified resource of information that we can use as well > as the design group. > > Thanks, > BLM > > ############################################################## > TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c > ############################################################## > To subscribe/unsubscribe, send a message to [log in to unmask] with following text in > the body: > To subscribe: SUBSCRIBE TECHNET <your full name> > To unsubscribe: SIGNOFF TECHNET > ############################################################## > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional > information. > If you need assistance - contact Keach Sasamori at [log in to unmask] or > 847-509-9700 ext.5315 > ############################################################## ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################