Recently, foreign media reported that Swedish Micro LED technology company Polar Light Technologies announced a partnership with chip bonding solution developer Finetech to jointly develop Micro LED technology. This collaboration has achieved significant progress in Micro LED technology for next-generation AR, HUD, and HMD applications.
Enhanced Flip-Chip Cold Bonding
Polar Light and Finetech have developed an improved flip-chip cold bonding technique to ensure precise alignment between Micro LEDs and electronic components.
Innovative Growth Techniques
It is reported that Polar Light Technologies is employing Atomic Layer Deposition (ALD) technology to grow its pyramid-structured Gallium Nitride (GaN) Micro LEDs on silicon carbide substrates. This pyramid structure is created through a novel bottom-up technique that does not require etching technology. This configuration provides LED chips with narrow beam characteristics, further enhancing Micro LED performance while maintaining submicron size.
Efficiency Gains in AR Systems
Compared to conventional LEDs, pyramid-shaped Micro LEDs can increase AR system efficiency by 50 to 200 times by enhancing both internal and external quantum efficiency and improving light utilization. By reducing internal electric field interference and optimizing the interactions of charge carriers within the quantum wells, these Micro LEDs can generate more light with a clearer and narrower emission spectrum, making them ideal for applications requiring precise light control, such as augmented reality (AR) and micro projectors.
Innovative Cold Press Bonding Method
However, due to the differing thermal expansion coefficients of silicon carbide and silicon (the final display substrate), heating during the bonding process is not feasible. To address this issue, Polar Light Technologies has collaborated with Finetech to develop a cold press bonding method using the automated FINEPLACER femto 2 submicron chip bonding equipment to align and bond Micro LED arrays. Early trials demonstrated an 85% success rate, proving its potential for large-scale manufacturing.
Disclaimer: The views and opinions expressed in this article are those of the original authors and do not necessarily reflect the official policy or position of MiniMicroLED Insights . While we strive to ensure the accuracy and reliability of the information provided, the content on this website may include translations, re-edited versions of second-hand information, or information derived from unverifiable sources. MiniMicroLED Insights makes no representations or warranties, express or implied, regarding the completeness, accuracy, or timeliness of such content. The information in this article is for informational purposes only and should not be construed as professional advice. Any reliance you place on such information is strictly at your own risk. To the fullest extent permitted by law, MiniMicroLED Insights disclaims all liability for any direct, indirect, incidental, consequential, or punitive damages arising out of your use of, or reliance on, the information contained in this article.
Copyright Notice: This article may include translated and re-edited content derived from various online sources, including websites and social media platforms. While we strive to credit the original authors and sources to the best of our ability, we may not always be able to verify the original source of the content. All rights to the original content remain with the original author or source publication. Where applicable, this content is reproduced for educational and informational purposes under the fair use doctrine. If you believe any content on this site infringes upon your intellectual property rights, or if you are the copyright owner and believe we have not credited you correctly, please contact us at minimicroled.business@gmail.com. We will investigate and take corrective action, including removing or properly crediting the content if necessary.
Content sourced and adapted by MiniMicroLED Insights (Doris).