The molybdenum cup and molybdenum pin, which are the main materials of the molybdenum electrode used for the LCD BLU CCFL electrode, have not been developed in Japan and all of them are imported and used from Japan, is giving a competitive burden. In this research, to develop the manufacturing technology of molybdenum pin used for CCFL electrode of LCD BLU, development of linear processing technology, development of molybdenum wire surface treatment technology, development of wire cutting technology, production of molybdenum pin, design and fabrication of JIG and Fixture for inspection, molybdenum pin prototyping and analysis, and development of 100% molybdenum pin inspection technology. In this paper, especially, research on prototype manufacturing and CAE analysis is treated.

The molybdenum cup and molybdenum pin, which are the main materials of the molybdenum electrode used for the LCD BLU CCFL electrode, have not been developed in Japan and all of them are imported and used from Japan, is giving a competitive burden. In this research, the CCFL electrode of LCD BLU is used to develop the manufacturing technology of molybdenum pin. The development of linear processing technology is used to that. The development of molybdenum wire surface treatment technology is used to that. The development of wire cutting technology is ued to that. The design and fabrication of JIG and Fixture for inspection is used to that. The molybdenum pin prototyping and analysis is used to that and finally, the development of 100% molybdenum pin inspection technology is used to that. In this paper, especially, research on design technology of wire cutting is treated.

The molybdenum cup and molybdenum pin, which are the main materials of the molybdenum electrode used for the LCD BLU CCFL electrode, have not been developed in Japan and all of them are imported and used from Japan, is giving a competitive burden. In this research, to develop the manufacturing technology of molybdenum pin used for CCFL electrode of LCD BLU, development of linear processing technology, development of molybdenum wire surface treatment technology, development of wire cutting technology, production of molybdenum pin, design and fabrication of JIG and Fixture for inspection, molybdenum pin prototyping and analysis, and development of 100% molybdenum pin inspection technology. In this paper, especially, research on surface treatment technology of molybdenum wire is treated.

Flat panel display devices are mainly used as information display devices in the 21st century. The worldwide waste flat panel displays are expected at 2-3 million units but most of them are land-filled for want of a proper recycling technology More specifically, rare earth metals of La and Eu are used as fluorescent materials of Cold Cathode Flourscent Lamp(CCFL)s in the waste flat panel displays and they are critically vulnerable and irreplaceable strategic mineral resources. At present, most of the waste CCFLs are disposed of by land-filling and incineration and proper recovery of 80-plus tons per annum of the rare earth fluorescent materials will significantly contribute to steady supply of them. A dearth of Korean domestic research results on recovery and recycling of rare earth elements in the CCFLs prompts to initiate this status report on overseas research trends and noteworthy research results in related fields.

Eu3+ -doped Y2O3 red phosphor was synthesized in a flux method using the chemicals Y2O3, Eu2O3,H3BO3 and BaCl2·2H2O. The effect of a flux addition on the preparation of Y2O3:Eu3+ red phosphor used asa cold cathode fluorescence lamp was investigated. H3BO3 and BaCl2·2H2O fluxes were used due to theirdifferent melting points. The crystallinity, thermal properties, morphology, and emission characteristics weremeasured using XRD, TG-DTA, SEM, and a photo-excited spectrometer. Under UV excitation of 254nm, Eu2O33.7mol% doped Y2O3 exhibited a strong narrow-band red emission, peaking at 612nm. From this result, thephosphor synthesized by firing Y2O3 with 3.7mol% of Eu2O3, 0.25mol% of H3BO3 and 0.5mol% of BaCl2·2H2Ofluxes at 1400oC for 2 hours had a larger particle size of 4µm on average compared to the phosphor of theH3BO3 flux alone. In addition, a phosphor synthesized by the two fluxes together had a rounder corner shape,which led to the maximum emission intensity.

Eu3+-activated R3GaO6 (R=Y, Gd) phosphors were prepared in a conventional solid-state reactionand their optical properties were investigated. These compounds exhibit strong red emission under lightexcitation at 254nm. The emission spectra are dominated by peaks appearing around 610-630nm that areinduced by the electric dipole transition of 5D0→7F2 of Eu3+. In addition, the appropriate CIE (CommissionInternationale de l’clairage) chromaticity coordinates, (x=0.656, y=0.336) for Y3GaO6 and (x=0.655, y=0.334)for Gd3GaO6, become closer to the NTSC (National Television System Committee) standard values. With theoptimized activator concentrations, the maximum emission brightness is approximately 80% of Y2O3:Eu3+typical red-emitting phosphor with improved color purity under an excitation condition of 254nm.