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To screen candidate materials for dynamic random-access memory capacitors, the tunneling probability at a constant equivalent oxide thickness (EOT) of metal-insulator-metal (MIM) capacitors was theoretically maximized according to a tradeoff between permittivity and band offset. As a result, it was found that cubic HfO2 with a TiN electrode is a promising candidate. TiN/Al-doped HfO2/TiN MIM capacitors...
We have proposed guiding principle of material selection of electrode/dielectric combination for MIM DRAM capacitors by theoretically taking the tunneling barrier height into account. Accordingly, we found that phase-controlled HfO2 (HfAlO) with TiN electrode is promising. TiN/HfAlO/TiN MIM capacitors with an ultra-thin Al2O3 on the bottom TiN electrode were fabricated and an EOT of 0.7 nm with a...
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