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Currently various studies are underway for dispensing high-viscosity phosphor. These studies have reported limita- tions and challenges in the dispensing process. The discharged amount of phosphor was approximately the same each time which is important for the implementation of high-efficiency white LED technology. This paper present high-viscosity phosphor dis- pensing process for white LED implementation by using electrostatic printing technology. The voltage controlled DOD (Drop- On-Demand) discharge experiment was studied to determine angle of drop meniscus at nozzle and dot diameter. With increase in Discharge voltage, the discharge angle of meniscus increased while dot diameter decreased. Therefore it can be concluded that we can control the discharge rate by controling the discharge angle of meniscus.

A Study on High Viscosity Phosphor Dispensing Process for Implementation of High-Efficiency White LED