By the composition analysis, it was confirmed that the migration of Pt into the center of the MoSi2 thin film was prevented. However, the quantity of Mo in the MoSi2 thin film near the Mo thin film and at the center of the MoSi2 thin film increased. This result is different from the stoichiometric composition ratio given by Mo:Si=1:2, and a marked increase in Mo content was observed. From the above results, it was found that Mo of the Mo buffer layer,instead of Pt, diffuses into the MoSi2 thin film. Thus, the decrease in the resistance is also explained by the diffusion