Electrostatic discharge damage is a serious problem on nitride-based light-emitting diodes (LEDs), due to their large lattice mismatch between III-nitride material and the sapphire substrate, which induces high-density threading dislocations. In this study, GaN/GaInN-based LEDs with various thicknesses of the low-temperature planarized p-GaN layer were fabricated. We found that when the V-shaped defects were filled by the planarized p-GaN layer, the survival rate of LEDs under human-body mode -4000 V stress increases from 23 to 93% and the survival rate under machine mode -600 V stress increases from 20 to 67%. Thus the ability to endure higher electrostatic discharge stress will be greatly improved.
|Journal||Japanese Journal of Applied Physics, Part 2: Letters|
|State||Published - 11 May 2007|
- Light-emitting diode
- Planarized p-GaN layer