Kioxia Corporation (Toshiba's memory unit that was spun-off in 2021), in collaboration with SK Hynix, announced that it has developed the world's smallest 1Selector-1MTJ cell.
Kioxia says that the two companies have demonstrated a reliable 1 selector-1 MTJ (1S1M) cell read/write operation with low read disturb rate of <1E-6 in 64 Gb cross-point array architecture. They have implemented cross-point 1S1M chips integrated in Half Pitch (HP) of 20.5 nm and MTJ CD of 20 nm using As-doped SiO2 selector and perpendicularly magnetized MTJ (p-MTJ).
The two companies developed a novel read scheme utilizing transient behavior of selector along with the low capacitance circuitry enables us to overcome MTJ read disturb easily occurred when the selector turns on in scaled 1S1M cells.
