Hello Technetters, I have a PCBA which has been built in PTH configuration with great success for years. However, due to the need for increased functionality in the same form factor, it seems that it is time to convert the PCBA to SMT format. My main concern relates to PCB flex and solder joint integrity... The PCBA is about 4" x 6". It is held along its 4" sides in a rack. A cable is plugged into the card via a connector along the top 6" side of the PCB (NOT a card edge connector, but PTH connector which means you push against the FACE of the PCBA. I do not know the force, but the PCB DOES flex significantly. Plus, since this is a home / contractor product, it does not get handled gingerly... THE PRIMARY CONCERN: Inducing cracks in either the components or solder joints of leadless surface mount components. What information exists with respect to this subject? What testing makes sense? What has been done already by others? Any help is appreciated. Thanks, Michael Lang [log in to unmask] ps. Hi RH! ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com ################################################################ TechNet E-Mail Forum 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://jefry.ipc.org/forum.htm) for additional information. For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312 ################################################################