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Optica Publishing Group
  • Journal of Display Technology
  • Vol. 11,
  • Issue 4,
  • pp. 374-377
  • (2015)

GaN-Based High-Voltage Light-Emitting Diodes With SU-8 Passivation

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Abstract

The authors propose the use of SU-8 to passivate the isolation trenches of GaN-based high-voltage light-emitting diodes (HV-LEDs). Compared with the HV-LED chips prepared with pure SU-8 passivation, it was found that we could increase the production yield from $\leq$ 35% to $\geq$ 88% using properly diluted SU-8 passivation layer. It was also found that we could reduce the passivation layer thickness by diluting SU-8 with a ratio of 5:2. Furthermore, it was found that the properly diluted SU-8 could provide smooth surface, minimized crack formation, and thus larger production yield.

© 2015 IEEE

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