Advanced STI technology with void free gap-fill and superior device performance for 45nm devices

H. Liu*, L. Wong, W. Lu, Z. G. Sun, I. Bangun, Y. P. Shen, Y. P. Wu, Z. Chen, M. S. Zhou, T. Chu, R. Leong, A. Jain, C. Ching, K. Raguputhi, H. Whitesell, J. Kasim, Z. Shen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

The gap-fill capability of HARP process is not only controlled by the O3/TEOS ratio of HARP deposition, but also strongly influenced by the STI trench profile and annealing conditions. HARP prefers a V-shaped STI trench profile with ≤ 86° slope for better gap-fill. Steam annealing will help to repair seam or tiny pinhole formed inside the trench after HARP deposition but the steam annealing temperature and time need to be strictly controlled to alleviate active Si loss. Replacing HDP with HARP for STI leads to a significant improvement of drive current for both nFET and pFET narrow width transistor because of tensile strain induced by HARP. Annealing condition shows dramatic impact on the tensile strain intensity inducing to Si. The tensile Si strain induced by HARP has been verified by micro-Raman spectroscopy.

Original languageEnglish
Title of host publicationSemiconductor Technology, ISTC2007 - Proceedings of the 6th International Conference on Semiconductor Technology
PublisherElectrochemical Society
Pages81-87
Number of pages7
ISBN (Print)9889884445, 9789889884444
Publication statusPublished - 2006
Externally publishedYes
Event6th International Conference on Semiconductor Technology, ISTC2007 - Shanghai, China
Duration: Mar 18 2007Mar 20 2007

Publication series

NameSemiconductor Technology, ISTC2007 - Proceedings of the 6th International Conference on Semiconductor Technology

Conference

Conference6th International Conference on Semiconductor Technology, ISTC2007
Country/TerritoryChina
CityShanghai
Period3/18/073/20/07

ASJC Scopus Subject Areas

  • Electrical and Electronic Engineering

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