Cryogenic electron microscope electron spin resonance board

This PCB has been designed for a specific electron spin resonance application with large exposed copper surfaces for cryogenic cooling (including may vias for better thermal conductivity and stability). It houses a single PT100 temperature sensor and a small 3x2mm microcoil to receive signals from decaying electron spins inside an electron microscope. As usual for PCBWay the ordering and manufacturing process went very simple and extremly fast (even though I had a design error on my side which has been resolved after nearly faster-than-light-speed feedback from the engineers at PCBWay). Again all of the microcoils have been manufactured perfectly well - which clearly separates PCBWay from competitors who had not been capable of those structures.