“…Magnesium oxide (MgO) has attracted the attention of many researchers for application to semiconductors (Bian et al, 2004;Henyk et al, 2005;Nam et al, 2006;Tamboli et al, 2009;Nakano et al, 2004). MgO shows an excellent antisputtering property, a high secondary electron emission coefficient, and visible light permeability.…”