Fundamental characteristics of MgO film and their influence on the operation of plasma displays

The relationships between lattice orientation of the electron-beam evaporat ed MgO layer used as protecting layer for ac plasma displays (ac-PDPs) and the discharge characteristics of color ac-PDPs were investigated by the mea surements of ion-induced secondary electron emission. It is proved that val ues of gamma(i) for MgO are large in the order of (220) orientation, (200) orientation, and (111) orientation, that is, gamma(i)(220) > gamma(i)(200) > gamma(i)(111). The values of phi for different lattice orientation are ob tained by the measurements of thermionic emission and photo emission. The a ging measurements for testing panels with the different lattice orientation of MgO layer revealed that performance of those panels are excellent in th e order of (220), (200), and (111). In particular, luminance and luminous e fficiency become larger in the order of (220), (200), and (111). It is poin ted cut that the degree of longevity, sustaining voltage, and memory margin for ac-PDPs with protecting materials as MgO are estimated by the measurem ents of gamma(i).