Hi Mark, In a message dated 10/18/0 10:59:08, [log in to unmask] writes: >1.) Should the pad on the bottom of a component be rectangular or square >or is this important? It is common to use circular pads, but there is ne reason not to use square or rectangular ones. In fact, test at Bell Labs have shown that one gets a better solder joint reliability with solder joints resulting from rectangular pads on component and PWB. Werner Engelmaier Engelmaier Associates, L.C. Electronic Packaging, Interconnection and Reliability Consulting 7 Jasmine Run Ormond Beach, FL 32174 USA Phone: 904-437-8747, Fax: 904-437-8737 E-mail: [log in to unmask], Website: www.engelmaier.com In a message dated 10/18/0 10:59:08, [log in to unmask] writes: >Does IPC address the following questions. We design and build SMT >components for pcb construction. If so, could somebody please specify >where these are referenced? >1.) Should the pad on the bottom of a component be rectangular or square >or is this important? --------------------------------------------------------------------------------- TechNet 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 TECHNET Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------