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Session 84 :
MicroLED Manufacturing
Emissive, Micro-LED, and Quantum-Dot Displays

Friday, May 17 / 09:00 AM   - 10:20 AM / San Jose Convention Center, 220C

Chair:
Zhaojun Liu, Southern University of Science and Technology, Shenzhen, China

84.1 - Invited Paper: Flexible Transparent MicroLED Array for Applications in Display and Visible Light Communication (9:00 AM - 9:20 AM)
  • Runze Lin, Xinyi Shan, Daqi Shen, Xugao Cui, Pengfei Tian
    Fudan University Shanghai China


  • Planar integration of RGB InGaN-based microLEDs on flexible transparent material is realized using transfer printing technology. Based on on-off keying (OOK) modulation and wavelength division multiplexing (WDM), visible light communication rates of about 100 Mbps can be achieved, demonstrating the feasibility of this integrated device in full-color display applications.
05/17/2024 9:00 AM 05/17/2024 9:20 AM America/Los_Angeles Flexible Transparent MicroLED Array for Applications in Display and Visible Light Communication Planar integration of RGB InGaN-based microLEDs on flexible transparent material is realized using transfer printing technology. Based on on-off keying (OOK) modulation and wavelength division multiplexing (WDM), visible light communication rates of about 100 Mbps can be achieved, demonstrating the feasibility of this integrated device in full-color display applications. San Jose McEnery Convention Center 220C Runze Lin, Xinyi Shan, Daqi Shen, Xugao Cui, Pengfei Tian
84.2 - Invited Paper: High-Resolution Additive Manufacturing in the Fabrication of MicroLED Displays (9:20 AM - 9:40 AM)
  • Filip Granek, Iwona Gr?dzka-Kurzaj, Jolanta Gadzali?ska, ?ukasz Witczak, Karolina Fi?czyk, Piotr Kowalczewski
    XTPL S.A. Wroc?aw Poland


  • Ultra-precise dispensing, a high-resolution additive manufacturing method, is used in the fabrication of microLED displays. The advancements in achieving ultra-small feature sizes, such as interconnections on complex topographies, edge printing, microvias filling, and microbumps dispensing, are described. The relevance of this technology for microLED display fabrication is discussed.
05/17/2024 9:20 AM 05/17/2024 9:40 AM America/Los_Angeles High-Resolution Additive Manufacturing in the Fabrication of MicroLED Displays Ultra-precise dispensing, a high-resolution additive manufacturing method, is used in the fabrication of microLED displays. The advancements in achieving ultra-small feature sizes, such as interconnections on complex topographies, edge printing, microvias filling, and microbumps dispensing, are described. The relevance of this technology for microLED display fabrication is discussed. San Jose McEnery Convention Center 220C Filip Granek, Iwona Gr?dzka-Kurzaj, Jolanta Gadzali?ska, ?ukasz Witczak, Karolina Fi?czyk, Piotr Kowalczewski
84.3 - Breakthrough for Test-Cost Reduction on MicroLED Device with High Parallel Single Insertion Testing of Electric-Luminescence Including External Quantum Efficiency and Electrical Test (9:40 AM - 10:00 AM)
  • Kotaro Hasegawa, Koji Miyauchi
    ADVANTEST CORPORATION Ora-gun,Gunma Japan

  • Hiroshi Kaga
    ADVANTEST CORPORATION Tokyo Japan


  • The biggest challenge in launching microLED displays is cost reduction. In a previous report, the authors proposed a super cost-effective test method embedding EL and electrical testing (PEMPTM). In this paper, they report the validity of PEMPTM by comparing the external quantum efficiency (EQE) of LED emission and photodetection characteristics.
05/17/2024 9:40 AM 05/17/2024 10:00 AM America/Los_Angeles Breakthrough for Test-Cost Reduction on MicroLED Device with High Parallel Single Insertion Testing of Electric-Luminescence Including External Quantum Efficiency and Electrical Test The biggest challenge in launching microLED displays is cost reduction. In a previous report, the authors proposed a super cost-effective test method embedding EL and electrical testing (PEMPTM). In this paper, they report the validity of PEMPTM by comparing the external quantum efficiency (EQE) of LED emission and photodetection characteristics. San Jose McEnery Convention Center 220C Hiroshi Kaga
84.4 - Transfer of Flip-Chip Structure MicroLED from Sapphire to Thin Film (10:00 AM - 10:20 AM)
  • Jiayi Li, Zhaojun Liu
    Southern University of Science and Technology Shenzhen China


  • Mass transfer is the key technology to realize the full color integration of microLED displays, which have a high yield requirement. In this work, laser is used to peel off the sapphire substrate, allowing an array of flip-chip structure microLED devices to be transferred onto the blue film. A UV film is then used for the secondary transfer of the micro-LED array, exposing the electrode structure and preparing the microLED array for subsequent bonding. The yield of the whole process can reach 99.7%.
05/17/2024 10:00 AM 05/17/2024 10:20 AM America/Los_Angeles Transfer of Flip-Chip Structure MicroLED from Sapphire to Thin Film Mass transfer is the key technology to realize the full color integration of microLED displays, which have a high yield requirement. In this work, laser is used to peel off the sapphire substrate, allowing an array of flip-chip structure microLED devices to be transferred onto the blue film. A UV film is then used for the secondary transfer of the micro-LED array, exposing the electrode structure and preparing the microLED array for subsequent bonding. The yield of the whole process can reach 99.7%. San Jose McEnery Convention Center 220C Jiayi Li, Zhaojun Liu