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Emerging Non-volatile Memories: Opportunities and Challenges

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  1. Emerging Non-volatile Memories:Opportunities and Challenges Shahar Kvatinsky Department of Electrical Engineering Technion – Israel Institute of Technology November 11, 2015

  2. The Problem with NAND Flash Flash memory 1x Source: D. Ruggeri, MICRON

  3. Going 3D

  4. Motivation for New Technologies • Scalability of 3D • Volatile technologies: • Energy (leakage, refresh in DRAM) • Limited density and scalability Chip energy Source: E. Esteve, IPNEST

  5. Emerging NonvolatileMemory Technologies • RRAM • PCM STT MRAM CBRAM

  6. Resistive RAM (RRAM, ReRAM)

  7. RRAM Status • Product: • Prototypes:24nm 2-layer 32Gb (ISSCC 2013)40us read, 230us write • Research/development:

  8. Conductive Bridging RAM(CBRAM, PMC) • Low voltage/power

  9. CBRAM Status • Products: • Prototypes:27nm 16Gb (ISSCC 2014)2us read, 10us write, 1T1R, 6F2 • Research/development:

  10. Phase Change Memory(PCM, PCRAM, PRAM)

  11. PCM Status • Products: • Prototypes: • Research/development: 20nm, 8 Gb, 2012 45nm, 1 Gb, 2012-14

  12. Spin-Torque Transfer Magnetoresistance RAM (STT MRAM)

  13. STT MRAM Status • Products: • Prototypes: • Research/development: 64Mb, DDR3, 400 MHz 1Mb, 45nm 32Mb

  14. Shared Properties • BEOL CMOS compatibility • Resistive • Nonvolatility • High endurance • Speed • Density • Low voltage • Retention

  15. Challenges • Selectors • Device variations • Yield • Power • Endurance Source: Crossbar, IEDM 2014

  16. Immediate Applications • NAND Flash replacement • Storage Class Memory • Embedded NVM

  17. On-Die Intensive Memory Circuits and Architectures Multistate Register Continuous Flow Multithreading

  18. FPGA Source: P.-E. Gaillardon, EPFL

  19. Logic with Memristors Integrating memristors with standard logic Memristor layer CMOS layer Logic within memory Beyond Moore Beyond Von-Neumann

  20. Neuromorphic Computing

  21. Circuits Source: T. Prodromakis, University of Southampton

  22. Summary • Need for new nonvolatile memory technology • Challenges • Opportunities for novel applications: • Logic • Programmable circuits • Neuromorphic • On-die memory

  23. Thanks! shahar@ee.Technion.ac.il