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Improvement of the SiO2/Si interface characteristics by two-step deposition with intermediate plasma treatment using N-2/He or O-2/He gas SCIE SCOPUS

Title
Improvement of the SiO2/Si interface characteristics by two-step deposition with intermediate plasma treatment using N-2/He or O-2/He gas
Authors
Yi, CKim, HURhee, SW
Date Issued
2002-04-03
Publisher
ELSEVIER SCIENCE SA
Abstract
Two-step deposition using O-2/He or N-2/He intermediate plasma treatment was studied to improve the characteristics of SiO2/Si interfaces. Under this method plasma damage on the Si surface could be minimized and the interface characteristics such as intermediate oxidation states, causing P-b center, and V-fb shift could be improved. In the case of the intermediate plasma treatment on 6 nm 1st oxide. the improvement of the interface characteristics was best. N-2/He plasma intermediate treatment showed better interface characteristics than O-2/He plasma treatment. The number of Si atoms (N-SiOx) in the sub-oxide region was decreased by approximately 27% after N-2/He plasma intermediate treatment compared with the sample without plasma treatment. Also, the transition layer thickness was decreased to 1.34 monolayers. P-b center density decreased from 4.7 X 10(12)/eV cm(2) to 2.29 X 10(11)/eV cm(2) due to nitrogen incorporation in the transition region. The moderate nitrogen incorporation near the SiO2/Si interface reduced the V-fb shift due to the decrease in the fixed oxide charge. (C) 2002 Elsevier Science B.V. All rights reserved.
Keywords
chemical vapor deposition; silicon oxide; interface; deposition process; CHEMICAL-VAPOR-DEPOSITION; LEVEL CONTROLLED INCORPORATION; BULK SILICON DIOXIDE; POLYCRYSTALLINE SILICON; PHOTOELECTRON-SPECTROSCOPY; ELECTRICAL-PROPERTIES; SI/SIO2 INTERFACES; SI-SIO2 INTERFACES; CHLORINE ADDITION; X-RAY
URI
https://oasis.postech.ac.kr/handle/2014.oak/20942
DOI
10.1016/S0040-6090(02)00081-0
ISSN
0040-6090
Article Type
Article
Citation
THIN SOLID FILMS, vol. 408, no. 1-2, page. 252 - 259, 2002-04-03
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