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Characterization of the gate oxide of an AlGaN/GaN high electron mobility transistor
2011
Applied Physics Letters
A subnanometer thick interfacial oxide layer present between the Ni/Au gate metal stack and semiconducting epilayers of an AlGaN/GaN high electron mobility transistor was characterized using high-angle annular dark-field scanning transmission electron microscopy and laser-assisted atom probe tomography. It was revealed that the oxide is composed of distinct Ni-oxide-rich and Al-oxide-rich layers with no Ga-oxide detected. The results provide information that is of potential importance in
doi:10.1063/1.3569715
fatcat:hchd6uefgrhqhca2of7mgaf4ka