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The Integration of Low-k Dielectric Material Hydrogen Silsesquioxane (HSQ) with Nitride Thin Films as Barriers

Published online by Cambridge University Press:  17 March 2011

Yuxiao Zeng ,
Linghui Chen  and
T. L. Alford
Linghui Chen
Affiliation:
Department of Chemical, Bio and Materials Engineering, NSF Center for Low Power Electronics, Arizona State University, Tempe, Arizona 85287-6006, USA
T. L. Alford
Affiliation:
Department of Chemical, Bio and Materials Engineering, NSF Center for Low Power Electronics, Arizona State University, Tempe, Arizona 85287-6006, USA
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Abstract

HSQ (hydrogen silsesquioxane) is one of the promising low-k materials used in VLSI technology as an intra-metal dielectric to reduce capacitance-related issues. Like any other dielectrics, the integration of HSQ in multilevel interconnect schemes has been of considerable importance. In this study, the compatibility of HSQ with different nitride barrier layers, such as PVD and CVD TiN, PVD TaN, and CVD W2N, has been investigated by using a variety of techniques. The refractory metal barriers, Ti and Ta, are also included for a comparison. The degradation of HSQ films indicates a strong underlying barrier layer dependence. With CVD nitrides or refractory metals as barrier, HSQ exhibits a better structural and property stability than that with PVD nitrides. The possible mechanisms have been discussed to account for these observations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 612: Symposium D – Materials, Technology & Reliability for Advanced Interconnects.. , 2000 , D9.11.1
Copyright
Copyright © Materials Research Society 2000

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References

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