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Electrode-Evaporation Method of III-nitride Vertical-type Single Chip LEDs

  • Kim, Kyoung Hwa (Department of Electronic Materials Engineering, Korea Maritime and Ocean University) ;
  • Ahn, Hyung Soo (Department of Electronic Materials Engineering, Korea Maritime and Ocean University) ;
  • Jeon, Injun (Department of Nanoenergy Engineering and Department of Nano Fusion Technology, Pusan National University) ;
  • Cho, Chae Ryong (Department of Nanoenergy Engineering and Department of Nano Fusion Technology, Pusan National University) ;
  • Jeon, Hunsoo (Power Semiconductor Commercialization Center, Busan Techno Park) ;
  • Yang, Min (Department of Electronic Materials Engineering, Korea Maritime and Ocean University) ;
  • Yi, Sam Nyung (Department of Electronic Materials Engineering, Korea Maritime and Ocean University) ;
  • Kim, Suck-Whan (Department of Physics, Andong National University)
  • Received : 2018.04.23
  • Accepted : 2018.06.05
  • Published : 2018.11.15

Abstract

An electrode-evaporation technology on both the top and bottom sides of the bare vertical-type single chip separated from the traditional substrate by cooling, was developed for III-nitride vertical-type single chip LEDs with thick GaN epilayer. The post-process of the cooling step was followed by sorting the bare vertical-type single chip LEDs into the holes in a pocket-type shadow mask for deposition of the electrodes at the top and bottom sides of bare vertical-type single chip LEDs without the traditional substrate for electrode evaporation technology for vertical-type single chip LEDs. The variation in size of the hole between the designed shadow mask and the deposited electrodes owing to the use of the designed pocket-type shadow mask is investigated. Furthermore, the electrical and the optical properties of bare vertical-type single chip LEDs deposited with two different shapes of n-type electrodes using the pocket-type shadow mask are investigated to explore the possibility of the e-beam evaporation method.

Keywords

Acknowledgement

Supported by : Ministry of TRADE, INDUSTRY & ENERGY(MOTIE)

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