Effective mobility and interface-state density of la2O 3 nMISFETs after post deposition annealing

Jin Aun Ng, Nobuyuki Sugii, Kuniyuki Kakushima, Parhat Ahmet, Kazuo Tsutsui, Takeo Hattori, Hiroshi Iwai

    Research output: Contribution to journalArticlepeer-review

    13 Citations (Scopus)


    In this paper, we reported the effective mobility and the interface-state density of La2O3 nMISFETs fabricated under different-post deposition annealing (PDA) conditions; annealing temperature (300°C - 600 °C) and ambient (N2 or O2). High effective mobility of 312cm2/Vs and low interface-state density of 6 × 10 10 cm-2/eV were obtained from La2O3 nMTSFET with equivalent oxide thickness (EOT) of 1.7 nm after PDA at 300 °C in N2 ambient for 10 minutes. Gate leakage current density was 6.8 × 10-6 A/cm2. We found that peak effective mobility decreased with increasing anneal temperature, regardless of annealing ambient. We also observed a monotonous relationship between effective mobility and interface-state density. This behavior suggests that lowering the interface-slate density is essential to oblain high mobility in the high-κ/Si structure.

    Original languageEnglish
    Pages (from-to)316-321
    Number of pages6
    JournalIEICE Electronics Express
    Issue number13
    Publication statusPublished - 2006 Jul 10


    • Interface-state density
    • LaO
    • Mobility
    • PDA
    • nMISFET

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Electrical and Electronic Engineering

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