ジャパンディスプレイ（6740） – JDI Develops World’s First G6 Oxide Semiconductor TFT with 4X Improvement in Field-Effect Mobility

[Provisional Translation Only] This English translation of the original Japanese document is provided solely for information purposes. Should there be any discrepancies between this translation and the Japanese original, the latter shall prevail. March 30, 2022 Japan Display Inc. (Tokyo Stock Exchange First Section, 6740) Representative: Scott Callon, Chairman & CEO Inquiries: Akihito Okochi, CFO Telephone: +81-3-6732-8100 www.j-display.com/english JDI Develops World’s First G6 Oxide Semiconductor TFT with 4X Improvement in Field-Effect Mobility ― Breakthrough in Display Performance ― Japan Display Inc. (JDI) has successfully developed the world’s first backplane technology to radically improve the properties of conventional oxide semiconductor thin film transistors (OS-TFT) at its G6 Plant in Mobara, Japan, and will begin immediate commercialization of this new technology. 1. Details of JDI’s New Technology JDI’s new OS-TFT technology generates high-mobility oxide semiconductors (HMO), which have 2X the field-effect mobility of conventional OS-TFTs, and ultra-high mobility oxide semiconductors (UHMO), which have 4X higher field-effect mobility than conventional OS-TFT (hereafter, HMO/UHMO collectively referred to as “HMO”). UHMO’s field-effect mobility on JDI’s G6 mass production line is 52cm2/Vs, an extraordinarily high level. More broadly, HMO enables the same level of on-current flow as LTPS, while maintaining low off-leak current. A further advantage of HMO is that while conventional high-mobility AMOLED backplanes require LTPS technology, which limits glass substrate sizes to G6, HMO can be used in G8 or larger production lines. Conventional OS HMO Field-Effect Mobility 12cm2/Vs 36cm2/Vs UHMO 52cm2/Vs 1 Transistor I-V Characteristic Comparison JDI believes HMO will drastically accelerate display technology innovation and contribute to significant improvements in both OLED and LCD display performance, including: ・ Lower power consumption; ・ For Metaverse VR/AR displays, higher resolutions and higher refresh rates, driving deeper immersion and reality integration for users in the Metaverse; ・ For transparent displays, higher transparency and image quality and bigger displays. Lower Power Consumption Higher Resolution HMO Attributes Conventional OS-TFTs have a problem of bias temperature stress (BTS), which causes poor reliability and image deterioration when trying to obtain high field-effect mobility. However, by leveraging the manufacturing process know-how JDI has developed over many years, JDI has overcome these challenges with HMO, which is a new, breakthrough OS-TFT with superior characteristics. HMO achieves both high field-effect mobility and stable BTS to concurrently realize OS-TFT’s low off-leak current and LTPS’s image driving stability. HMO uses crystalline oxide materials developed by Idemitsu Kosan Co., Ltd. Field-Effect Mobility Comparison 2 Bias Temperature Stress Variability Characteristic Comparison PBTS：Positive Bias Temperature Stress NBTIS：Negative Bias Temperature Irradiation Stress 2. Forward Outlook (1) HMO Mass Production Start JDI is already in HMO deployment discussions with multiple customers and plans to start mass production in 2024. (2) HMO Sales Target JDI believes that HMO is a breakthrough technology that has extremely broad application across display types and customer applications. As one use case, JDI plans to combine HMO with JDI’s next-generation OLED technology to expand G6 wearable display production, with a sales target for this use case of c. JPY 25 billion in FY26/3 and JPY 50 billion in FY27/3. (3) HMO Development Costs HMO builds upon JDI’s core capabilities in backplane technology built over many years. Thus, additional expenses required for HMO commercialization will be less than JPY 1 billion. (4) HMO Earnings Impact While HMO will have minimal impact on JDI’s current FY22/3 consolidated earnings, JDI believes it will reinforce JDI’s global display technology leadership and drive JDI’s long-term, sustainable growth. JDI will promptly disclose the details if matters requiring further disclosure arise. 3