A plasma display panel comprising first and second substrates positioned substantially parallel to each other, facing each other and separated from each other by a predetermined distance is disclosed. A plurality of address electrodes are formed on the first substrate. A first dielectric layer covers the plurality of address electrodes on the first substrate. A plurality of barrier ribs having predetermined heights are mounted on the first dielectric layer, creating discharge spaces between the first and second substrates. Phosphor layers are formed within the discharge spaces. A plurality of discharge sustain electrodes are formed on the surface of the second substrate facing the first substrate and are positioned perpendicular to the address electrodes on the first substrate. A second dielectric layer is formed on the second substrate covering the discharge sustain electrodes. A protection layer comprising MgO and Ca, Al, Fe and Si dopants covers the second dielectric layer.

 
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< Piezoelectric substance and manufacturing method thereof, piezoelectric element and liquid discharge head using such piezoelectric element and liquid discharge apparatus

> Keyboard or other input device using ranging for detection of control piece movement

> Method of forming a composite containing a matrix component and at least one liquid crystal component

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