*3.1. E*ff*ects of Annealing Temperature on Ti:SnO2 Film Thickness*

Table 1 shows the thickness of the various Ti:SnO2 films, measured by alpha–step profilometer (KLA-Tencor, Milpitas, CA, USA). In general, it is noted that while the annealing temperature has no significant effect on the film thickness, the thickness increases slightly in the film annealed at 200 ◦C but then reduces progressively as the annealing temperature is further increased to 500 ◦C.


**Table 1.** Effects of annealing temperature on thickness of Ti:SnO2 films.
