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Self-patterned Al2O3/Al microplasma devices with phosphor-coated, parabolic cross-sectional microcavities have been operated in Ne/Xe gas mixtures at pressures up to 700 torr. Arrays comprising 20 000 devices (200 times 100) having 140-mum-diameter emitting apertures produce a green luminance of 1900 cd/m2 when operated in a Ne/30% Xe mixture at 500 torr.
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