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We demonstrate flip-chip light-emitting diodes (FC-LEDs) on a flexible yttria-stabilized zirconia (YSZ) substrate and compare them with FC-LEDs on a polymeric substrate. Degradation of luminescence intensity and red-shift of peak wavelength are not observed for the LED on the flexible YSZ, unlike one on the polyimide substrate, due to improved capability to remove the generated heat from the chip...
The RF windows have been used in the Pohang Accelerator Laboratory, Pohang Light Source-II (PLS-II) must meet the conditions for operating at a peak power of 80 MW and a repetition rate of 10 Hz. In these operational conditions of the PLS-II, the original RF window that was designed for a peak power of 60 MW is more likely to inflict damages that cause vacuum leaks. Therefore, for the new RF window,...
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