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Sökning: WFRF:(Kabeer S)

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  • Wernersson, Lars-Erik, et al. (författare)
  • A combined chemical vapor deposition and rapid thermal diffusion process for SiGe Esaki diodes by ultra-shallow junction formation
  • 2005
  • Ingår i: IEEE Transactions on Nanotechnology. - 1536-125X. ; 4:5, s. 594-598
  • Tidskriftsartikel (refereegranskat)abstract
    • SiGe Esaki diodes have been realized by rapid thermal diffusion of phosphorous into an SiGe layer grown by ultra-high-vacuum chemical-vapor-deposition on an Si p(+)-substrate for the first time. The phosphorous-doped SiGe forms the n(+)-electrode, while heavily boron-doped Si0.74Ge0.26 and Si substrate is used for the p(+) electrode. The diodes show a peak current density of 0.18 kA/cm(2), a current peak-to-valley ratio of 2.6 at room temperature, and they exhibit only a weak temperature dependence. Cross-sectional transmission microscopy showed a good crystalline quality of the strained Si0.74Ge0.26 layer even after the diffusion step at 900 degrees C.
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  • Wernersson, Lars-Erik, et al. (författare)
  • SiGe Esaki tunnel diodes fabricated by UHV-CVD growth and proximity rapid thermal diffusion
  • 2004
  • Ingår i: Electronics Letters. - : Institution of Engineering and Technology (IET). - 1350-911X .- 0013-5194. ; 40:1, s. 83-85
  • Tidskriftsartikel (refereegranskat)abstract
    • A process for realisation of SiGe Esaki diodes in layers grown by ultra-high vacuum chemical vapour deposition has been developed and the first Esaki diodes are reported for this growth method. Intrinsic SiGe-layers are grown on highly boron-doped p(+)-Si layers, while post-growth proximity rapid thermal diffusion of phosphorous into the SiGe is employed to form an n(+)-layer. Tunnel diodes with a depletion layer width of about 6 nm have been realised in Si0.74Ge0.26, showing a peak current density of 0.18 kA/cm(2) and a current peak-to-valley ratio of 2.6 at room temperature.
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  • Resultat 1-4 av 4

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