Figure 2
PCRAM switching performance.
Correlation between the minimum pulse-width achieved and cell size for (a) reset and (b) set. As the cell size decreases, the cells with grain size of 5 nm can achieve much shorter pulse-width compared to that of the cells with grain size of 9 nm, by up to 400%. Dependence of the minimum voltage on the pulse-width achieved to (c) reset and (d) set a 25 nm cell. The shortest pulse widths achieved were 350 ps and 3 ns for reset and set, respectively. (e) Cycling endurance of a cell with grain and cell sizes of 5 nm and 25 nm, respectively. Stable and reversible switching for 108 cycles was achieved with short reset and set pulse of 6 ns and 9 ns, respectively. This shows that both high speed and high stability can be achieved at the same time.
