Disc-type Phase-change Memory Devices for Analog In-memory Computing

We introduce a phase-change memory (PCM) device architecture tailored for analog in-memory computing (AIMC). By confining the active, switchable volume to a compact disc-shaped geometry, this design enables a continuum of non-volatile states programmable at ultra-low currents and power (~40 μA/μW), even in standard undoped $Ge{_₂}Sb{_₂}Te{_₅} (GST)$. Furthermore, the device exhibits a resistance window spanning over three orders of magnitude, while achieving higher overall resistance.