Color Plasma Display Panels (PDPs) has become one of the important developing trends in the information display field

phosphor is of critical role to the performance of PDPs. The phosphor in PDPs is coated by screen printing method. In the process of making into phosphor paste for screen printing and in the process of fabricating the PDPs

the performance of phosphor might be decreased. This is processing deterioration. After PDPs being finished the performance of phosphor could be decreased further with the continuous operation of PDPs. This is timing deterioration. The causes of occurring processing deterioration and timing deterioration are analyzed. The monocolor experimental PDP is manufactured. Chromaticity coordinates of phosphor in the PDP are measured by the CRT Color Analyzer (CA-100) which are compared with the chromaticity coordinates supplied by the phosphor manufacturer. Much data of processing deterioration and timing deterioration of phosphor is obtained. The experiment results show that (1) the processing deterioration of green phosphor (Zn

2

SiO

4

:Mn

2+

) and blue phosphor(BaMgAl

10

O

17

:Eu

2+

) is serious; (2) the timing deterioration of blue phosphor is most serious

y and x coordinate increasing by 10% and 5% respectively. We think (1) amending the phosphor paste ingredients and composition which results in the decrease of sintering temperature of phosphor

and using phosphor with larger specific surface area will be helpful to prevent the phosphors from processing deterioration; (2) amending the performance of MgO to enhance its anti-sputter ability

and using new driving method to prevent the phosphors from ion bombardment is helpful to improve the timing deterioration.