Tantalum-gate thin-film SOI nMOS and pMOS for low-power applications

Autor: Kazuhide Ino, Hisayuki Shimada, Tadahiro Ohmi, Yuuichi Hirano, T. Ushiki
Rok vydání: 1997
Předmět:
Zdroj: IEEE Transactions on Electron Devices. 44:1903-1907
ISSN: 0018-9383
DOI: 10.1109/16.641359
Popis: The threshold voltages of thin-film fully-depleted silicon-on-insulator (FDSOI) nMOS and pMOS have been controlled by employing tantalum (Ta) as the gate materials. Ta-gate FDSOI MOSFET's have excellent threshold voltage control for 1.0 V application on low impurity concentration SOI layers in both nMOS and pMOS. The low-temperature processing after the gate oxidation step leads to good on/off characteristics in Ta-gate SOI MOSFET's because of no reaction between Ta gate electrode and SiO/sub 2/ gate insulator. This technology makes it possible to drastically decrease the number of the process steps for CMOS fabrication, because the same gate material is available for both nMOS and pMOS.
Databáze: OpenAIRE