We have a connector mfg that claims that their design is good and does not contribute to the problem that we are having. The problem is evidence of poor soldering. All other components that surround this connector have very good solder joints, with the exception of the connector. Temperature profile has been confirmed as being correct and the PCB shows no evidence of warpage, discoloration and contamination (before or after SMT).
The connector was examined mechanically and was determined that the foot of the is ~ 0.02-0.06 mm above the plastic body of the connector. There spec calls out 0.1mm as a tolerance. So this means that the connector is within their spec. Now a Molex part has their leads below the plastic body by ~0.05mm. This allows the leads to make contact with the SMT pad when placed through the solder paste.
Since we had purchased 40K connectors I need to prove that these bad connectors (not Molex) are not designed for proper SMT operations. This is why I'm looking for SMT Component design requirements.
Best Regards, Eric Reno
FinePoint Innovations, Inc. Manufacturing / Production Engineer 1220 South Park Lane, Suite 1 Tempe, Arizona 85281-6940 USA Ph: 602-325-2099 (Direct Line) Ph: 602-325-2080 (Main) Fx: 480-967-9427 Email: ereno@finepointinnovations.com ereno@fpi2.com Web: http://www.finepointinnovations.com http://www.fpi2.com
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