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Nanocrystal Non-volatile Memory Devices Kedar Patel Liu et al (April 2006) Blauwe (Trans. on Nanotechnology, March 2002) Lin et al (TED, April 2006)

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Presentation on theme: "Nanocrystal Non-volatile Memory Devices Kedar Patel Liu et al (April 2006) Blauwe (Trans. on Nanotechnology, March 2002) Lin et al (TED, April 2006)"— Presentation transcript:

1 Nanocrystal Non-volatile Memory Devices Kedar Patel Liu et al (April 2006) Blauwe (Trans. on Nanotechnology, March 2002) Lin et al (TED, April 2006)

2 NV Memory Device Programming Channel Hot Electron injection or Fowler- Nordheim tunneling into poly or nc-Si Erase Fowler Nordheim tunneling to substrate or source

3 Quantum Scale! For 50nm x 50nm memory cell (transistor) and 10 12 cm -2 nanocrystal density:  25 nc per cell For 32nm x 32nm memory cell (transistor) and 10 12 cm -2 nanocrystal density:  10 nc per cell

4 Fabrication Excess Si-Precipitation –Few 1-10keV, 10 16 cm -2 Si implanted in SiO 2 + 1000C N 2 anneal  3-10nm nc-Si precipitates, ~10 12 cm -2 Aerosol Deposition –Pyrolysis of Silane (SiH 4 ) at 950C Direct Deposition –LPCVD of Poly-Si; stop shortly after nucleation of sites before a continuous film is formed

5 PbSe or Co Nanocrystals Tang et al (TED, March 2007)


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