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REG: Whether VIA needs spoke connection?

girish

 Hi,

Good day to all !

  Are u giving   thernal relief (spokes) for the via's?. recently I have recieved a info. form assembly house saying that

  if we give a full contact for via's dry soldering will happen during manual soldering.

please share your experience on this.

Regards,

Girish Kumar

 

  • Amit2812

    Yes it is true.

    If your design an power supply where current carrying capacity is required more that time in design via dimeter gets increased & spokes are necessary to get it soldered in wave soldering.

    If your design doesnot consist power tracks (or having less current requirement) not needed to solder the via & spokes are not needed.

  • Mashak

     Hi,

     All the power and Gnd pins of a Surface mount component has vias directly to ground and specifically the decaps. Electrically its preferred that the Vias have full contact to the power planes. This works well with the automatic assembly.

     

    Providing full contact may cause some issues while hand soldering beacuse all the of a Surface mount components gets soldered fast compared to the ones going to the power planes using the Vias as they require more heat compared to the other pins.

    Most of the designs now use full conatct for vias. 

    One suggestion from my side will be, for decaps if you are provding thick trace from the pin to vias try to do that on both the sides. This will equalize the amount of heat required to solder the components on both the pads.

     

     

     

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