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Improvement of Thermal Stability of Nickel Silicide Using Multi-Capping Structure

Journal Solid State Phenomena (Volumes 121 - 123)
Volume Nanoscience and Technology
Edited by Chunli BAI, Sishen XIE, Xing ZHU
Pages 1261-1264
DOI 10.4028/www.scientific.net/SSP.121-123.1261
Citation Yong Jin Kim et al., 2007, Solid State Phenomena, 121-123, 1261
Online since March, 2007
Authors Yong Jin Kim, Chel Jong Choi, Soon Young Oh, Jang Gn Yun, Won Jae Lee, Hee Hwan Ji, Jin Suk Wang, Hi Deok Lee
Keywords Multi-Capping, Multi-Capping Layer, Salicide, Surface Morphology, Thermal Stability
Abstract

In this paper, the electrical properties of NiSi have been characterized using multi capping layer structure for nano CMOS application. We have investigated the formation and thermal stability of Ni silicide using Ni, Ti and TiN capping layers (Ti/Ni/TiN) as a function of Rapid Thermal Processing (RTP) temperature. It was shown that the NiSi with multi capping layer has lower sheet resistances than that with single capping (TiN) layer. NiSi with multi capping layer also showed much better thermal stability. It was verified that the formation Ni-Ti-Si ternary like layer at the top region of thhe NiSi results in improvement of thermal stability.

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