Mo is 5.0 × 10-3 °C and that of MoSi2 is 7.489 × 10-4 °C ,
as calculated from Fig. 4, it is speculated that the ratio of
Mo in the MoSi2 thin film increased owing to the separation
of Si from MoSi2 as the heating was repeated. Consequently, the temperature coefficient of the heater increased.
To explain the cause, the composition of the MoSi2 thin film
with the Mo buffer layer was analyzed by EDX. Table 2