Device performance of in situ steam generated gate dielectric nitrided by remote plasma nitridation

被引:17
作者
Al-Shareef, HN
Karamcheti, A
Luo, TY
Bersuker, G
Brown, GA
Murto, RW
Jackson, MD
Huff, HR
Kraus, P
Lopes, D
Olsen, C
Miner, G
机构
[1] Int Sematech Inc, Austin, TX 78741 USA
[2] Appl Mat Inc, Santa Clara, CA 95050 USA
关键词
D O I
10.1063/1.1379363
中图分类号
O59 [应用物理学];
学科分类号
摘要
In situ steam generated (ISSG) oxides have recently attracted interest for use as gate dielectrics because of their demonstrated reliability improvement over oxides formed by dry oxidation. [G. Minor, G. Xing, H. S. Joo, E. Sanchez, Y. Yokota, C. Chen, D. Lopes, and A. Balakrishna, Electrochem. Sec. Symp. Proc. 99-10, 3 (1999); T. Y. Luo, H. N. Al-Shareef, G. A. Brown, M. Laughery, V. Watt, A. Karamcheti, M. D. jackson, and H. R. Huff, Proc. SPIE 4181, 220 (2000).] We show in this letter that nitridation of ISSG oxide using a remote plasma decreases the gate leakage current of ISSG oxide by an order of magnitude without significantly degrading transistor performance. In particular, it is shown that the peak normalized transconductance of n-channel devices with an ISSG oxide gate dielectric decreases by only 4% and the normalized drive current by only 3% after remote plasma nitridation (RPN). In addition, it is shown that the reliability of the ISSG oxide exhibits only a small degradation after RPN. These observations suggest that the ISSG/RPN process holds promise for gate dielectric applications. (C) 2001 American Institute of Physics.
引用
收藏
页码:3875 / 3877
页数:3
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