For most applications, NASA seems to prefer polyimide substrates, which will be familiar to anyone who has ordered a flexible PCB. The Kapton film upon which these are built is a polyimide ...

but the solder mask is made from thin Kapton tape which is attached to a vinyl backing but then transferred onto the PCB. It does sound a bit fiddly in places, but there are plenty of photos to ...

The new size costs $24.96 and comes with the KryoSheet and Kapton tape to protect the PCB and capacitors from electrocution. KryoSheet is a thermal paste alternative with a thermal pad to cool a ...