1. Ovonic Optical/Electrical Phase Change Regime Amorphous Regime
Information accumulation
Direct Overwrite Reversible
pre -
amorphous
Crystalline/Amorphous Multi State Regime
threshold regime
Amorphous Regime
(LOW Reflectivity
HIGH Resistance State)
Multi
State
regime
Binary
Ovonic
RESISTANCE
Percolation
Regime
Optical/Electrical
Regime
Phase Change
Regime
Crystalline Regime
(HIGH Reflectivity
LOW Resistance State)
Various pulsing protocols
are used depending upon
the nature of the task
performed
NUMBER OF CONSTANT )
AMPLITUTE PULSES
crystallinity
VARIABLE AMPLITUDE PULSES
(Each pulse induces
(Each pulse induces
amorphicity )