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In situ synchrotron radiation photoemission study of Ge$$_{3}$$N$$_{4}$$/Ge structures formed by plasma nitridation

プラズマ窒化により形成したGe$$_{3}$$N$$_{4}$$/Ge構造のその場放射光光電子分光研究

細井 卓治*; 朽木 克博*; 岡本 学*; 吉越 章隆 ; 寺岡 有殿; 志村 考功*; 渡部 平司*

Hosoi, Takuji*; Kutsuki, Katsuhiro*; Okamoto, Gaku*; Yoshigoe, Akitaka; Teraoka, Yuden; Shimura, Takayoshi*; Watanabe, Heiji*

Atomic structure and thermal stability of Ge$$_{3}$$N$$_{4}$$ dielectric layers for advanced Ge-MIS devices were investigated. SR-PES analysis revealed that Ge$$_{3}$$N$$_{4}$$ layers formed by high-density plasma nitridation are thermally stable up to 823 K, while surface oxides selectively decompose at around 773 K. Chemical shift originating from Ge-N bonds (Ge$$^{4+}$$) was also found to be 2.3 eV.

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