IEICE Transactions on Electronics
Online ISSN : 1745-1353
Print ISSN : 0916-8524
Special Section on Fundamentals and Applications of Advanced Semiconductor Devices
Stress Effect Analysis for PD SOI pMOSFETs with Undoped-Si0.88Ge0.12 Heterostructure Channel
Sang-Sik CHOIA-Ram CHOIJae-Yeon KIMJeon-Wook YANGYong-Woo HWANGTae-Hyun HANDeok Ho CHOKyu-Hwan SHIM
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2008 Volume E91.C Issue 5 Pages 716-720

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Abstract

The stress effect of SiGe p-type metal oxide semiconductor field effect transistors (MOSFETs) has been investigated to compare their properties associated with the Si0.88Ge0.12/Si epi channels grown on the Si bulk and partially depleted silicon on insulator (PD SOI) substrates. The stress-induced changes in the subthreshold slope and the drain induced barrier lowering were observed small in the SiGe PD SOI in comparison to in the SiGe bulk. Likewise the threshold voltage shift monitored as a function of hot carrier stress time presented excellent stability than in the SiGe PD SOI. Therefore, simply in terms of do properties, the SiGe PD SOI looks more immune from electrical stresses than the SiGe bulk. However, the 1/f noise properties revealed that the hot carrier stress could introduce lots of generation-recombination noise sources in the SiGe PD SOI. The quality control of oxide-silicon in SOI structures is essential to minimize a possible surge of 1/f noise level due to the hot carrier injection. In order to improve dc and rf performance simultaneously, it is very important to grow the SiGe channels on high quality SOI substrates.

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© 2008 The Institute of Electronics, Information and Communication Engineers
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