https://devzone.nordicsemi.com/f/nordic-q-a/42541/microvia-on-nrf52840-qiaa-rHello, We have choose NRF52840-QIAA-R for our design, can you give me more infrmation on microvia use between layer 1 and layer 2 please? What is drilling and pad dimension? microvia on ball is mandatory? can you use microvia between ball? Thanksen-USTelligent Community 13Wed, 16 Jan 2019 10:17:15 GMThttps://devzone.nordicsemi.com/thread/165910?ContentTypeID=1Wed, 16 Jan 2019 10:17:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8c26918a-0da3-4c8a-b9aa-60fffc8ea91cSimonr<p>Hi</p> <p>The microvia hole sizes are 5.906mil (0.15mm). The pad dimensions are 10.827mil*10.827mil (0.275mm*0.275mm). Can you please specify what you mean by &quot;ball&quot;? The microvias used in our PCB designs are mandatory to make room for tracks to all pads on the nRF52840 chip.&nbsp;</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>