Fundamental Characteristics of MgO Film and Their Influence on the Operation of Plasma Displays

Kunio YOSHIDA  Heiju UCHIIKE  Masahiro SAWA  

IEICE TRANSACTIONS on Electronics   Vol.E82-C   No.10   pp.1798-1803
Publication Date: 1999/10/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Electronic Displays)
ac-PDPs,  lattice orientation of MgO protecting layer,  secondary electron emission yield,  work function,  thermionic emission,  

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The relationships between lattice orientation of the electron-beam evaporated MgO layer used as protecting layer for ac plasma displays (ac-PDPs) and the discharge characteristics of color ac-PDPs were investigated by the measurements of ion-induced secondary electron emission. It is proved that values of γi for MgO are large in the order of (220) orientation, (200) orientation, and (111) orientation, that is, γi(220) > γi(200) > γi(111). The values of φ for different lattice orientation are obtained by the measurements of thermionic emission and photo emission. The aging measurements for testing panels with the different lattice orientation of MgO layer revealed that performance of those panels are excellent in the order of (220), (200), and (111). In particular, luminance and luminous efficiency become larger in the order of (220), (200), and (111). It is pointed out that the degree of longevity, sustaining voltage, and memory margin for ac-PDPs with protecting materials as MgO are estimated by the measurements of γi.