To obtain a high-quality Germanium (Ge) metal-oxide-semiconductor structure, a Ge gate stacked structure was fabricated using neutral beam post-oxidation. After deposition of a 1-nm-thick Al metal film on a Ge substrate, simultaneous oxidation of Al and Ge was carried out at 300 °C, and a Ge oxide film with 29% GeO2 content was obtained by controlling the acceleration bias power of the neutral oxygen beam. In addition, the fabricated AlOx/GeOx/Ge structure achieved a low interface state density of less than 1 × 1011cm-2eV-1 near the midgap.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)