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Voltage-current characteristics of the array for Ne pressures between 500 and . The current measurements include the displacement current and the voltage waveform was bipolar with a frequency and pulsewidth of , and , respectively. A SEM of a single microcavity plasma device in cross section is shown by the inset.
Photograph of a device array (fabricated on a -diam Si wafer), alongside a array of similar design (Ref. 5) and a U.S. quarter dollar.
(Color) Photographs of the array: (left) The entire array operating in of Ne; (right) A segment of the array depicting the pixel-to-pixel emission uniformity. The Ne pressure is again .
(Color) Operation of the array in of Ne (left) and in a Xe mixture (right). For both photographs, a -thick film of a green phosphor , screen printed onto a -thick glass microscope slide, is mounted above only the upper half of the array. An uncoated plate covers the remaining half of the array and the array-phosphor spacing is .
Dependence of the luminous efficacy on the rms driving voltage when a array operating with Ne/20%–50% Xe gas mixtures illuminates a film of green phosphor screen printed onto a glass plate. A sinusoidal ac waveform with a frequency of excited the array and data are presented for a total mixture pressure of . Estimated uncertainties, representative of those for all of the data, are shown for several measurements and the curves are intended as a guide to the eye. Also, the variation of the array luminance with ac excitation voltage (rms) is illustrated by the inset. Data are given for the same experimental parameters (, 20%–50% Xe, ).
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