BGA Escape pattern for nRF52840 0.35mm pitch WLCSP

[MSDEV]

I've been working with the nRF52840 WLCSP package for a month or two now, and in many ways it's a great compact chip. However, as my projects require more and more pins, I've run into a routing problem. Is there a recommended chip escape pattern that can route these pins out without using multiple layers of microvias? 

[Simonr]

Hi

Thank you for providing some more details, but we don't have any escape pattern suggestions except the one we've got in the PS. What you could do, is to use that as a reference, as it only uses two layers for routing the pins. The HW files can also be downloaded from the product page here if that's of interest.

Best regards,

Simon