| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a protective film for a PDP for next generation which is more excellent than a known MgO protective film in terms of the ion-impact secondary electron emission ratio. <P>SOLUTION: In a means of improving the ion-impact secondary electron emission characteristic, the work function, crystallinity and the surface shape are improved, and the secondary electron emission ratio is enhanced by adding a material having small band gap (NiO, ZnO, Eu<SB>2</SB>O<SB>3</SB>, SnO<SB>2</SB>or CaO) to MgO. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
