Tungsten carbides as a diffusion barrier for Cu metallization


Carbides of refractory metals have been used as diffusion barriers due to their high melting point and good thermal and mechanical stability. In this work binary WC films have been investigated as Cu diffusion barriers by using ex-situ sheet resistance (Rs), X-ray diffraction (XRD) measurement and in-situ laser light scattering measurements. It was found that the WC film has stronger oxidation resistance and a comparable diffusion barrier performance as W films. However, the Cu agglomeration was severe for the Cu/WC/Si structures

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@article{Xie2006TungstenCA, title={Tungsten carbides as a diffusion barrier for Cu metallization}, author={Qi Xie and Yu-Long Jiang and Christophe Detavernier and R. L. Van Meirhaeghe and Xin-Ping Qu}, journal={2006 8th International Conference on Solid-State and Integrated Circuit Technology Proceedings}, year={2006}, pages={342-344} }