CoSi2 formation from CoxNi1?x/Ti system
The presence of Ni can significantly promote the CoSiCoSi2 transformation process reducing the transformation temperature and, in consequence, the thermal budget of silicidation. In this work, silicidation of the Si/Co0.95Ni0.05/Ti system was investigated. Four point probe (4PP), Auger electron spectroscopy (AES), X-ray diffraction (XRD), Rutherford backscattering spectroscopy (RBS), and transmission electron microscopy (TEM) were used to characterise the silicide films. It was found that CoNi silicide can be formed at lower temperatures compared to the pure Co/Ti process, at the same time keeping important properties such as sheet resistance and roughness close to those of pure CoSi2.
sheet resistance roughness coxni1?x silicide ti cap