Electronics Forum: no picture (4)

Re: castellations vs. no castellations

Electronics Forum | Mon Jul 26 19:32:03 EDT 1999 | Steve Gregory

| Can anyone give me the virtues of SMT package castellations vs. no castellations with particular reference to the ruggedness and reliability of the solder joints? Any references or studies that you can point me to? Also, although I'm in favor of

QFN PCB Pad no Drain Hole

Electronics Forum | Fri May 31 18:00:55 EDT 2013 | hegemon

With regards to first picture.(Large themal vias) I would attempt to measure the area of the ground pad, less the area of the "drain" holes or Thermal Vias. From that result I would reduce the aperture to account for about 50% coverage of that remai

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