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DDM Novastar

Turnkey SMT assembly solutions, manual & automated stencil printers, manual & automatic pick & place systems with dispensers, wave solder & selective solder machines, lead free solder reflow ovens, component counters, & thru-hole

SMT Stencil Printers for PCB Assembly

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Main Office

165 Boro Line Road
King of Prussia, Pennsylvania, 19406
United States


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  • DQFN INSUFFICIENT SOLDER
  • Adriano  3/06/2015 2 posts
    341 views
    Hi, I have faced some problems with DQFN PACKAGE 132 PIN. After some cross sections and dye pry analysis we could find a head on pillow situation always on inner row pads. The PCBAs are double side and the DQFNs are assembled on Bottom side (Notebook PCBA). The PCB DQFN pads are NSMD. We have tried at least 5 different stencils designs and many reflow profiles (the current one has the PWI lower than 50%). If we follow the exact supplier stencil opening recomendation, situation gets worst.
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