金属/GeO2界面における化学結合状態の光電子分光分析

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  • 金属/GeO_2界面における化学結合状態の光電子分光分析(ゲート絶縁薄膜,容量膜,機能膜及びメモリ技術)
  • キンゾク GeO2 カイメン ニ オケル カガク ケツゴウ ジョウタイ ノ コウデンシ ブンコウ ブンセキ
  • Photoemission Study of Chemical Bonding Features at Metal/GeO_2 Interfaces

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Abstract

We have investigated chemical bonding features at thermally-grown GeO_2/Ge(100) and metals (Al, Au and Pt)/GeO_2 interfaces by using high-resolution X-ray photoelectron spectroscopy (XPS). After the Al evaporation on GeO_2 thicker than 1.9nm initially, a reduction of GeO_2 accompanied with the generation of Al-Ge bonds was observed near the interface between Al and GeO_2. From the deconvolution of measured Ge3ds/2 spectra taken after physical vapor deposition of Au- and Pt-ultrathin films on thermally-grown GeO_2, we have confirmed the formation of Ge sub-oxide components (GeO_x 0<x<2) at the metal/GeO_2 interfaces being quantitatively comparable to sub-oxides at the thermally-grown GeO_2/Ge(100) interface.

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