“…31) Later on, an Aoyama Gakuin group led by Shigesato extended their study of the H 2 O effect on sputtered ITO films, and hydrogen incorporation was revealed by secondary ion mass spectroscopy. 32,33) H 2 O effects have also been studied by several other groups such as Ando et al, 34,35) Nishimura et al, 36) Rottmann et al, 37,38) and Wang et al, 39) and similar results were obtained. Koida [40][41][42] The H 2 effect, on the other hand, was studied by Zhang et al, 25) Betz et al, 26) Luo et al, 43,44) Marikkannan et al, 45) and Juneja et al, 46) and the effect of H 2 O and H 2 on sputtered oxide films were reviewed by Abe.…”