https://devzone.nordicsemi.com/f/nordic-q-a/64896/aqfn-package-footprint-ipcHi, Looking at the footprint you supply for the aQFN73 package (I have looked at the one supplied for nRF52840), I see that the pad have a size = 0.275mm. If IPC-7351 is followed, and the Maximum Material Condition (MMC) is used for the pads, the resultingen-USTelligent Community 13Tue, 18 Aug 2020 07:40:12 GMThttps://devzone.nordicsemi.com/thread/264998?ContentTypeID=1Tue, 18 Aug 2020 07:40:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d2e17d72-6a3a-4244-90f2-37d5432d7c51Mr.Martin<p>Ok!<br />Thanks for the reply <span class="emoticon" data-url="https://devzone.nordicsemi.com/cfs-file/__key/system/emoji/1f642.svg" title="Slight smile">&#x1f642;</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/264990?ContentTypeID=1Tue, 18 Aug 2020 07:10:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1ef25ef9-1417-405b-add3-148395a983a9ketiljo<p>The footprint was made based on an appnote from ASE, the company that makes the aQFN packet:<a href="https://devzone.nordicsemi.com/cfs-file/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-530c23d213364a0b8058b8e0aed577cd/aQFN-application-note-and-aQFN_2C00_LGA-process.pdf">devzone.nordicsemi.com/.../aQFN-application-note-and-aQFN_2C00_LGA-process.pdf</a></p> <p>Why they deviate from IPC, I don&#39;t know, but there haven&#39;t been any production problems, at least for the DKs.</p><div style="clear:both;"></div>