Electrical properties and interfacial issues of high-k/Si MIS capacitors characterized by the thickness of Al2O3 interlayer

Autor: Xing Wang, Hongxia Liu, Chenxi Fei, Lu Zhao, Shupeng Chen, Shulong Wang
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: AIP Advances, Vol 6, Iss 6, Pp 065224-065224-7 (2016)
Druh dokumentu: article
ISSN: 2158-3226
DOI: 10.1063/1.4955001
Popis: A thin Al2O3 interlayer deposited between La2O3 layer and Si substrate was used to scavenge the interfacial layer (IL) by blocking the out-diffusion of substrate Si. Some advantages and disadvantages of this method were discussed in detail. Evident IL reduction corroborated by the transmission electron microscopy results suggested the feasibility of this method in IL scavenging. Significant improvements in oxygen vacancy and leakage current characteristics were achieved as the thickness of Al2O3 interlayer increase. Meanwhile, some disadvantages such as the degradations in interface trap and oxide trapped charge characteristics were also observed.
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