D. H. CHO ET AL: 'Passivation of Bottom-Gate IGZO Thin Film Transistors', JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 54, no. 925, 15 January 2009 (2009-01-15), pages 531, XP055006585, ISSN: 0374-4884, DOI: 10.3938/jkps.54.531