What is the surface finish of the nRF52840 (AU over nickel, AU-PD-NI, other)?https://devzone.nordicsemi.com/f/nordic-q-a/33222/what-is-the-surface-finish-of-the-nrf52840-au-over-nickel-au-pd-ni-otherWe are fine tuning our manufacturing process placing the nRF52840 and would like to know what surface finish is used on the chip. I was not able to find this in the spec.en-USTelligent Community 13Wed, 11 Apr 2018 12:42:48 GMTRE: What is the surface finish of the nRF52840 (AU over nickel, AU-PD-NI, other)?https://devzone.nordicsemi.com/thread/127838?ContentTypeID=1Wed, 11 Apr 2018 12:42:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:83a889d6-ba78-4d47-b352-9fd594e758dbbaldrichNI<p>Thanks!</p><div style="clear:both;"></div>RE: What is the surface finish of the nRF52840 (AU over nickel, AU-PD-NI, other)?https://devzone.nordicsemi.com/thread/127701?ContentTypeID=1Wed, 11 Apr 2018 00:28:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e3bd6b01-4380-4a77-9760-45225d01eb8aNordic QA<p>Dear Bekah,</p> <p>LF material is Cu, then plating Ni, Pd and Au. <br /> Ni: 0.001~0.00254 <br /> Pd: 0.00002~0.00015 <br /> Au: 0.000010 Min. <br /> </p> <p>or in inch</p> <p>Ni: 0.0000394~0.0001 <br /> Pd: 0.0000008~0.0000059 <br /> Au: 0.0000004 Min <br /> &nbsp; Unit: inch </p> <p>Kind Regards, Jos</p> <p>Jos van de Giesen, Field Quality Manager</p> <p>&nbsp;</p><div style="clear:both;"></div>