We developed new MgO paste of T-5α in order to us e thick-film-printing technology for fabricating MgO protecting layer in ac plasma displays. It is confirmed that sustaining voltage of ac plasma display with Screen printed MgO Protecting layer is almost the same value of that with vacuum evaporated one. And annealing process of T-5α has been definitely shown by the measurement of DSC.

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The present work has focused on reducing the firing voltage applying a mixture of CaO and SrO for the protecting layer. The basic caracteristics of several kinds of mixture of CaO and SrO were investigated by using XRD and ESCA. Consequently, firing voltage of the panel using only CaO is lower than that of MgO.

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Priming discharge plays an important role to control an AC-PDP(Plasma Display Panel). In order to clarify the priming effect, the decay of the vacuum ultra-violet emission from xenon molecules, formed by 2- or 3- body destruction of xenon metastable atoms, at various gas pressure, was measured using a photon-counting technique and the decay constants were determined. It results that xenon metastable atoms can hardly contribute to priming effect of long decay in the AC-PDP.

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Experiments on the DC-PDP with transparent cathode showed the following results : (1) In order to improve the luminance and luminous efficiency under the condition of same discharge current per cell, it is effective to increase the area of cathode. (2)If the ratio of the area surrounded with barrier ribs to that of transparent cathode is more than 80%, the change of the sustain voltage cannot be observed. (3)The empirical equation for the lifetime is obtained. From these results, we can obtain a panel without temporal change of sustain voltage for a long time, a long life panel. And the luminance and the luminous efficiency increase by two times that of the usual one.

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The density of VUV-emitting Xe(ls_4) atoms in a micro-cell of color Plasma Display Panel (PDP) was measured for the first time by using laser absorption-spectroscopy. A microscope was adopted to focus the probe laser beam into the cell and the temporal and spatial variation of the Xe(ls_4) density was measured. The obtained maximum density was 2.4x10^<13>cm^<-3> , which was consistent with the result of one-dimensional calculation.

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To achieve a fine cell pitch and high luminance, an 8-in. pulse memory PDP with a reflective-type phosphor layer was experimentally fabricated The sufficient margin of 17 V, for memory operation and twice luminance as large as that of a conventional PDP with transmissive-type phosphor layer were obtained. Although the location of the trigger electrode was changed from a rear plate to a front plate due to the introduction of the reflective-type phosphoriayer, effective priming for addressing was confirmed. As a result, TV pictures with a stable memory operation could be reproduced on the panel. This study will open the way to high-resolution pulse memory PDPs.

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The new pulse memory drive scheme called CPM (Cathode Pulse Memory) was proposed. The waveform of CPM has two voltage stages while the conventional one has three. This was accomplished by applying sustain pulses to cathodes and by driving auxiliary anodes with constant voltage pulses. A drive circuit of 40-in PDP by CPM was fabricated. In this circuit, auxiliary anodes were driven using LC resonance, and cathodes were driven from both sides. Hi-Vision pictures were reproduced with a large memory margin. The power consumption of the circuit was 1/7 of the conventional one.

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Plasma display panels, we call them PDPs, are one of the flat panel displays , which make use of discharge phenomenon for indication. color indication panels make use of Photluminescence that was excited and emitted a fluorescent substance by ultraviolet rays. Therefore, informations that were connected with ultraviolet rays are important for higher brightness and luminous efficiency that are problems for color panels utility. In this experiment, Ne+Xe gas was used for working gas and We measured about spectra emitted from the states concerned with ultraviolet rays emission of 1470A by two- and three-phase driving method.

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For the purpose of realizing the very fine barrier electrode ac plasma displays, we fabricated the barrier electrode ac plasma displays by applying the sandblasting method and measured the characteristics of luminance and luminous efficiency for the panel with a cell pitch of 0.5mm. And we examined the influence of sandblasting on dielectric layer and the cause of a decline in luminance and luminous efficiency.

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Surface-Discharge ac plasma displays have the characteristics such as wide viewing angle ,and they are recognized as leading display devices for full color display with a large areas. A barrier ribs electrode ac plasma display with the new structure of eleetrodes has the advantages of high luminance and high luminous efficiency. Then we analyzed the action of the barrier ribs electrode ac plasma display by the computer,the surface potential distribution ,the wall charge distribution ,and the variation of light emitting region became clear. These result shows that it has the enough memory margin even if the pulse width is short,and doesn't go down the luminance because the discharge finishes short time. so it is effective for high speed drive.

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Full color plasma display panels using etched metal sheet as cathode electrodes have been studied. In this panel, a lower than 20V of sustain voltage and a 2-fold improvement of brightness were obtained compared to a panel using think film printed Ni as cathode electrodes. As one of new cathode material coating technologies,electroplated Ni cathodes have been studied. The plated cathodes had some advantages; the resistance of a plated cathode electrode was one third of that of non plated cathode electrode and a change of sustain voltage after 2000 hour dischsrge lifetest was very few.

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The Plasma display panel(PDP) is considered to be one of the most suitable devices among all the various types of "Flat display panel" exceeding 40 inches. On the other hand, technologies for manufacturing such large scale panels seems to be not matured and also having much unknown fields. The authers are reporting some newly developped manufactring processes:which should be a combination of the Thick-film printing technology and Photo-etching technology. They found that the new PDPs utilizing newly developped processes should an outstanding characteristies when they compared those of conventional PDPs of screen-printing procsse.

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