Countless through-holes on the PCB

While browsing the artwork on the pcb,
I came across a myriad of pictures with throught holes like the one pictured.

Why did you do that?


High current and/or high power dissipation.


Look up via stitching.

Yes via stitching connect 2 planes together.
No problem now but they used to charge per hole on the pcb at one time !

Some fabs still charge extra above some arbitrary drills per square inch figure

Many holes mean vias?

As @Jonathan_Haas commented above, just type “via stitching” into google and pages of repetitive, but thorough, explanations will present themselves.

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