10:30 〜 10:45
▲ [14a-4C-6] [Young Scientist Presentation Award Speech] Interface-aware high-k dielectric designing for deep sub-nm EOT Ge gate stack
キーワード:Germanium,High-k,Interface
Intensive investigation has been done on the gate stack formation on Ge and prominent interface passivation has been demonstrated by high quality GeO2-based dielectrics. However, it is still challenging to achieve deep sub-nm EOT with maintaining good interface because the use of a high-k dielectric layer might also degrade the interface. In this work, we provide a high-k dielectric designing strategy, which can help us to find the interface aware high-k on Ge. As an example, YScO3/Y-GeO2/Ge stack is demonstrated with good interface and EOT scalability.