| 摘要 |
PROBLEM TO BE SOLVED: To provide an MgO deposition material which is manufactured with excellent yield, can provide excellent discharge responsiveness over a wide temperature range, and enables the number of address IC to be considerably reduced without degrading panel luminance. SOLUTION: An MgO deposition material for forming a protection film 22 for a PDP is composed of an MgO pellet having an MgO purity of≥98% and a relative density of≥90%. The pellet includes one or two or more kinds of elements selected from a group consisting of Y, La, Ce, Pr, Nd, Pm and Sm. Concentration of Y is 5-10,000ppm when containing Y, concentration of La is 5-15,000ppm when containing La, concentration of Ce is 5-16,000 ppm when containing Ce, concentration of Pr is 5-16,000ppm when containing Pr, concentration of Nd is 5-16,000ppm when containing Nd, concentration of Pm is 5-16,000ppm when containing Pm, and concentration of Sm is 5-16,000ppm when containing Sm. COPYRIGHT: (C)2006,JPO&NCIPI
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