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FvM, yeah microsection shows a small gap between pad and tail, maybe 0.1mm or so. On bad joints this is quite full of voids and some are full cracks.
Marce, thanks. We are trying different stencils. .. can too much solder be a bad thing (assuming we don't get shorts?
Thanks Dick, good idea about holding it in place.
FvM, I don't have full datasheet sorry. It's a samtec ZHR5-20-02-F-RA though. Drawings available online. Incidentally, we had some problems with the plastic connector warping during reflow. Anyone had similar problem before? I wonder if that...
Thanks Barry, thanks dick
Barry,
no deliberate vibration or temperature cycling applied. However the parts will have seen some baking at 70oC for a few hours to cure some glue used elsewhere. Actually, we try to fit a brass shell to the connector after connector is fitted and when we solder...
Hi, I have a problem with a surface mount connector. .. nearly half of the 40 pins have bad solier joint after reflow. They look OK but they fail after a few weeks (cracking). Have tried touchup by reflowing the bad joints using solder iron but the parts fail again a few weeks later. Using sn63...
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