1. 1) A. Kinbara: Supattaringu Genshou (Sputtering Phenomena) (Univ. Tokyo Press, Tokyo, 1984) p. 137 and p. 167 [in Japanese].
2. 2) A. Morimoto: in Hakumaku Handbook (Thin Film Handbook), ed. The 131st Committee on Thin Films, Japan Society for the Promotion of Science (Ohmsha, Tokyo, 2008) 2nd ed. Chap. 1, p.44 [in Japanese].
3. Approach to estimate gettering effects in Ti–O2 reactive sputtering process
4. 4) H. Kobayashi: Supatta Hakumaku (Sputtering of Thin Films), (Nikkan Kogyo Shinbun, Tokyo, 1993) p. 81 [in Japanese].
5. 5) T. Asamaki: Hakumaku Sakusei no Kiso (Fundamentals of Thin Films Formation) (Nikkan Kogyo Shinbun, Tokyo, 2005) 4th ed., p. 219 [in Japanese].