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Wall thickness of a via hole...

C Shiva

 Hi all,

 What is the standard via hole wall thickness for micro, buried and PTH? When putting of vias for a power signal, it is an important issue to maintain the flow of sufficient current. Any feedback will be appreciated.

Regards,

Shiva.

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  • Nagaraj Shanmu
    Shiva,
     
    Via hole size is decided based on Aspect ratio which is the ratio of hole size to board thickness. Via hole wall thickness is determined by the plating normally 1/2 OZ or 1OZ is used based on your design application. Power boards will go for more Ounces.
     
    for power signal via - its important to condider the current, temperature rise in PCB, plating, PCB material used. You can download the Saturn PCB design toolkit from www.saturnpcb.com  to calculate via current.
     
    Goodluck!!
Reply
  • Nagaraj Shanmu
    Shiva,
     
    Via hole size is decided based on Aspect ratio which is the ratio of hole size to board thickness. Via hole wall thickness is determined by the plating normally 1/2 OZ or 1OZ is used based on your design application. Power boards will go for more Ounces.
     
    for power signal via - its important to condider the current, temperature rise in PCB, plating, PCB material used. You can download the Saturn PCB design toolkit from www.saturnpcb.com  to calculate via current.
     
    Goodluck!!
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