CEA-LETI, 17 rue des Martyrs, Grenoble Cedex, France, LTM (CNRS-UJF), 17 rue des Martyrs, Grenoble Cedex, France, Department of Physics, Comilla University, Comilla, Bangladesh

Although silicide oxidation was studied 20 years ago, the interest of obtaining a robust process for new application appears significant today. Indeed, for the new architectural development process are required dense and narrow spaces. This paper focuses to bury a silicide layer under a protective layer such as silica in order to keep constant the physical and electrical properties of silicide after oxidation. Earlier works show the possibility to oxidize preferably the silicon (Si) in metal contained silicide rather than a pure crystalline Si at high temperatures. Thus, we first tried to reproduce and study these conditions and once acquired, targeted to decrease the oxidation temperature in order to fit with industrial requirements. Titanium (Ti) and Nickel (Ni) are chosen for their metallurgical interest and their integration capability in devices. Thus, four different group/phases (TiSi, TiSi2, Ni2Si, NiSi) of silicide were targeted by adjusting the temperature. In situ X-ray diffraction (XRD), photoelectron spectroscopy and sheet resistance (four point probe) measurements were carried out simultaneously before and after oxidation of silicide to characterize the phase and chemical composition. After silicide formation last three phases (TiSi2, Ni2Si, NiSi) were confirmed by XRD and G1(Ti/Si) was unknown, where only for NiSi was observed the low sheet resistance (?7.3 ?/?) and resistivity (18 ??·cm). After (dry, wet and plasma) oxidation, the phases of TiSi2 and Ni2Si changed and only NiSi was observed the constant phase, even pure SiO2 was noted on NiSi after wet oxidation. © 2017 Elsevier Ltd

In situ sheet resistance, In situ X-ray diffraction, In situ X-ray photoelectron spectroscopy, Oxidation, Silicidation

CMOS integrated circuits, Nickel, Photoelectrons, Photons, Sheet resistance, Silica, Silicides, Silicon oxides, X ray diffraction, X ray photoelectron spectroscopy, Chemical compositions, Development process, In-situ X-ray diffraction, Industrial requirements, Integration capability, Oxidation temperature, Silicidation, Situ x-ray photoelectron spectroscopy, Oxidation