Abstract
In this work, the effects of carbon pre-germanidation implant into Ge on the properties of NiGe films were systematically investigated. NiGe films with carbon pre-germanidation implant to doses varying from 0 to 6×1015cm−2 were characterized by means of sheet resistance measurement, X-ray diffraction (XRD), scanning electron microscopy (SEM), cross-sectional transmission electron microscope (X-TEM) and secondary ion mass spectroscopy (SIMS). The presence of C atoms is proved to significantly enhance the thermal stability of NiGe by about 100°C as well as to change the preferred orientations of polycrystalline NiGe. The homogenous redistribution of C atoms within NiGe films and the segregation of C atoms at the NiGe/Ge interface is responsible for the improved thermal stability of NiGe films.
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