I thought resettable fuses were already polymer based?
PPTCs are just plastic and metal with no semiconductors afaik
Is this actually an MIT article?
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> This is, to the best of our knowledge, the first report of fully 3D-printed resettable fuses.
I think unique the contribution is that the entire circuit -- active and passive -- can be made with this one single material. Normally, you need to use many different materials and chemical baths to make a circuit with active components, but using this metal-polymer mix, you can _just_ deposit the metal and you are finished.