New Research Achieves Micro LED Growth on 100nm Sapphire Nano-membrane without Etching

A research team at Seoul National University (SNU) successfully grew a Micro LED array on a 100 nm-thick sapphire nano-membrane. The results were published on Scientific Reports on May 5, 2020.

According to the published paper, the team, led by Euijoon Yoon of the Department of Materials Science and Engineering of SNU, designed the sapphire nano-membrane array to grow an array of multi-faced Micro LEDs sized 4 μm × 16 μm. With the method, the Micro LED chip singulation does not need to go through plasma etching process, leading to a better external quantum efficiency (EQE).

(Image: Scientific Reports/SNU)

Compared to GaN formed on planar substrate, the new approach demonstrate a reduced Micro LED dislocation density by 59.6% and an improved internal quantum efficiency by 44%. Micro LEDs on sapphire nano-membranes also deliver 3.3 times higher photoluminescence.

In addition, since the thin (100nm) sapphire nano-membrane can be broken with mechanical force, Micro LEDs can be separated from the substrate and transferred to the display driving backplane more easily to simply the process and reduce cost.

This technology breakthrough is believed to accelerate the commercialization of Micro LED display technology as it overcomes the limitation of current Micro LED manufacture process.

The study was jointly conducted by researchers of SNU, Samsung Advanced Institute of Technology, KAIST, and Korea Photonics Institute with the support from Samsung Future Technology Promotion Center, Ministry of Education BK21 Plus Project and Korea Research Foundation.

Disclaimers of Warranties
1. The website does not warrant the following:
1.1 The services from the website meets your requirement;
1.2 The accuracy, completeness, or timeliness of the service;
1.3 The accuracy, reliability of conclusions drawn from using the service;
1.4 The accuracy, completeness, or timeliness, or security of any information that you download from the website
2. The services provided by the website is intended for your reference only. The website shall be not be responsible for investment decisions, damages, or other losses resulting from use of the website or the information contained therein<
Proprietary Rights
You may not reproduce, modify, create derivative works from, display, perform, publish, distribute, disseminate, broadcast or circulate to any third party, any materials contained on the services without the express prior written consent of the website or its legal owner.

Specifiers can realize the best quality of light and the highest levels of light output and efficacy at 3000K and 95CRI San Jose, CA – Lumileds today announced substantial performance improvements for its 90 and 95 CRI LUXEON CoBs with C... READ MORE

For many years, XLamp® XP-E2 LEDs have been the preferred LED choice for lighting manufacturers looking to combine different colors of light together to service specialty lighting applications. The XP-E2 platform offers an unbeatable combi... READ MORE