A study on interface and charge trapping properties of nitridedn-channel metal-oxide-semiconductor field-effect transistors by backsurface argon bombardment
作者:
P. T. Lai,
J. P. Xu,
Y. C. Cheng,
期刊:
Journal of Applied Physics
(AIP Available online 1997)
卷期:
Volume 82,
issue 4
页码: 1947-1950
ISSN:0021-8979
年代: 1997
DOI:10.1063/1.366007
出版商: AIP
数据来源: AIP
摘要:
A low-energy (550 eV) argon-ion beam was used to directly bombard the backsurface of nitridedn-channel metal-oxide-semiconductor field-effect transistors (n-MOSFETs) after the completion of all conventional processing steps. The interface and oxide-charge trapping characteristics of the bombarded MOSFETs were investigated as compared to nonbombarded and reoxidized-nitridedn-MOSFETs. It was found that after bombardment, interface state density decreases and interface hardness against hot-carrier bombardment enhances, and oxide charge trapping properties were also improved. The improvements exhibit a turnaround behavior depending on bombardment conditions and could be attributed to stress compensation in the vicinity of theSi/SiO2interface and an annealing effect. ©1997 American Institute of Physics.
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