What is PCMO ReRAM?

The idea of non-volatile, resistive RAM (ReRAM) has been around for a while. The idea is to change the resistance of a memory cell to encode the usual binary value. Other memory technologies have the same idea although how long data remains intact and how it is maintained differs.
4DS Memory has added Praseodymium Calcium Manganese Oxygen (PCMO) ReRAM to the mix. The basic technology was started in 2007 has resulted in a 20-nm demo chip to highlight the technology (Fig. 1).