How to add via holes on a thermal pad of QFN footprint?

[tdarlic]

Hi

Try this thread I think it might help you

Pad Holes Under SMT for Heat Sinking and other questions

Hey there, so I got a couple of newbie questions. I’m using this part: http://www.mouser.com/ds/2/348/rq3e120gn-373299.pdf Rohm Semi LL Mosfet, there’s no footprint for a HSMT-8 Package, so I started creating one. Until I sat down and started doing the drawing of this, I had not realized how small the part was 3.3x3.3mm! Anyways, I’m not going to be driving it anywhere near it’s maximum current, however since I had to design a footprint, I wanted to include some provision of sinking away some of…

Basically, you can overlap pads with the same pin number and the KiCad will connect it on your board. So put the via with the same pin number directly over your pad #5 and it should work.