09-02-2013, 01:01 PM
Prospects for Solid State Data Storage: Beyond Flash Memory and the Hard Disk Drive
Beyond Flash Memory.pdf (Size: 4.19 MB / Downloads: 46)
Incumbent Semiconductor Memories
Attributes for universal memories:
–Highest performance
–Lowest active and standby power
–Unlimited Read/Write endurance
–Non-Volatility
–Compatible to existing technologies
–Continuously scalable
–Lowest cost per bit
A new class of universal storage device :
– a fast solid-state, nonvolatile RAM
– enables compact, robust storage systems with solid
state reliability and significantly improved costperformance
Non-volatile, universal semiconductor memory
Everyone is looking for a dense (cheap) crosspoint memory.
It is relatively easy to identify materials that show bistable hysteretic behavior
(easily distinguishable, stable on/off states).
Micro-Nanoscale Decoder
• Sub lithographic feature is selected by
moving depletion across the fine structure
• Modulating signal is brought in by
lithographically defined lines
• Fins down to sub 20 nm have been addressed
Magnetic Racetrack Memory
•Data stored as pattern of domains in
long nanowire or “racetrack” of
magnetic material.
•Data stored magnetically and is nonvolatile.
•Current pulses move domains along
racetrack – no moving parts, just the
patterns move.
•Each memory location stores an
entire bit pattern (10, 100, 1000
bits?) rather than just a single bit.