The Improvement for Performance of White LED chip using Improved Fabrication Process

제조 공정의 개선을 통한 백색 LED 칩의 성능 개선

  • Ryu, Jang-Ryeol (Division of Electrical Electronic & Control Eng., Kongju National University)
  • 류장렬 (공주대학교 전기전자제어공학부)
  • Received : 2011.11.30
  • Accepted : 2012.01.05
  • Published : 2012.01.31


LEDs are using widely in a field of illumination, LCD LED backlight, mobile signals because they have several merits, such as low power consumption, long lifetime, high brightness, fast response, environment friendly. To achieve high performance LEDs, one needs to enhance output power, reduce operation voltage, and improve device reliability. In this paper, we have proposed that the optimum design and specialized process could improve the performance of LED chip. It was showed an output power of 7cd and input supplied voltage of 3.2V by the insertion technique of current blocking layer. In this paper, GaN-based LED chip which is built on the sapphire epi-wafer by selective MOCVD were designed and developed. After that, their performances were measured. It showed the output power of 7cd more than conventional GaN-based chip. It will be used the lighting source of a medical equipment and LCD LED TV with GaN-based LED chip.


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