This document discusses emerging non-volatile memory technologies and focuses on Ovonic Unified Memory (OUM). It outlines the limitations of current memory technologies like DRAM, RAM, and FLASH. It then explains the fundamentals and operation of OUM, which uses a chalcogenide material that can be switched between amorphous and crystalline structural states by applying electric current to heat the material. The document notes several advantages of OUM, including its non-volatility, high density, simple structure, low cost and scalability. OUM offers improved memory that addresses many of the limitations of present technologies.

1. BY
RAJA SHEEBA.R
III Yr,ECE

2.  Introduction
 Limitations of present memory technology
 Fundamentals of emerging memories
 Ovonic unified memory
 Amorphous vs. crystalline
 OUM architecture
 Basic device operation
 Features of OUM
 Advantages of OUM
 Conclusion
 References

3. † Semiconductors form the fundamental building
blocks of the modern electronic world providing
the brains and the memory of products all around
us from washing machines to super computers
† Current memory technologies have a lot of
limitations
† Material limited scaling - era

4.  DRAM – volatile & difficult to integrate
 RAM – high cost & volatile
 FLASH – slower writes
- less number of write/erase cycles
 Expansion in 2D space

5. FeRAM
POLYMER MEMORY
NROM
MRAM
OVONIC UNIFIED MEMORY

6.  Most promising one.
 Material used is CHALCOGENIED
 Instead of using laser beam, use electric current to
heat the material
 Structural states:
Amorphous -
high temperature, high current, high resistance
Crystalline -
low temperature, medium current, low resistance

10. † Non volatile
† High density
† Non destructive read
† Highly scalable
† Low cost

11.  Reversible structural phase change
 Small active storage medium
 Low voltage single supply
 High temperature resistance
 Simple planar device structure
 Simple manufacturing process
 Reduced assembly and test costs

12. † Optimized OUM
† All mechanic dependency
† Oum offers low power operation and radiation
tolerance

13.  www.intel.com
 www.ovonyx.com
 www.baesystems.com
 www.aero.org