Electronic and Optoelectronic System Research Laboratories, Industrial Technology Research Institute
A Novel Solution Gas Barrier (SGB) Technology for Flexible AMOLED
Kuan-ting Chen, Shu-Tang Yeh, Yung-Hui Yeh, Glory Chen, Jia-Chong Ho, and Cheng-Chung Lee
Electronic and Optoelectronic System Research Laboratories (EOSL)
Industrial Technology Research Institute (ITRI), Taiwan, 31040, R.O.C.
For plastic-based OLED panel, because of poor water vapor barrier properties of plastic films, OLED materials react with ambient moisture rapidly and their performances deteriorate significantly without proper barrier. Therefore, it is necessary to encapsulate the devices with films having high gas barrier properties. To improve of barrier property of plastic films, inorganic layers such as silicon dioxide and aluminum oxide are fabricated onto plastic films generally by sputtering and CVD (chemical vapor deposition) with fairly high fabrication cost. A novel solution-coated gas barrier (SGB) technique with high gas barrier function by roll-to-roll (R2R) process was proposed by Yuta Suzuki et al, in 2014. Recently, a Gen 2.5 (370 mm ´ 470 mm) solution-coated gas barrier by sheet-to-sheet (S2S) process for flexible AMOLED applications, including LTPS backplane, OLED thin film encapsulation and front plate were developed in ITRI. The water vapor transmission rate (WVTR) of two layers stacked SGB layers can achieve ~10-6 g/m2-day after 200,000 times/3mm radius folding test. The OLED device integrated with SGB as thin film encapsulation also exhibits good reliability after 60°C/90% R.H. environmental test.
Kuan-Ting Chen holds a Ph.D. in Electrical Engineering from I-Shou University in Taiwan. He is currently a manager of Display Technology Center in Industrial Technology Research Institute (ITRI). With R&D experience for more than 10 years, his research interests focus on the OLED devices, process and panel integration, module of flexible display and AMOLED. He has more than 17 technical papers published in journals and conferences along with over 32 patents related to display technologies. His R&D team have successfully developed the foldable touch AMOLED base on ITRI’s FlexUP technology. More recently, they have also integrate the solution-coated Gas barrier (SGB) with foldable AMOLED and exhibit good performance and reliability.
Industrial Technology Research Institute (ITRI) is one of the world’s leading technology R&D institutions aiming to innovate a better future for society. Founded in 1973, ITRI has played a vital role in transforming Taiwan’s industries from labor-intensive into innovation-driven. It focuses on the fields of Smart Living, Quality Health, and Sustainable Environment. Over the years, ITRI has incubated over 270 innovative companies, including well-known names such as UMC and TSMC. In addition to its headquarters in Taiwan, ITRI has branch offices in the U.S., Europe, and Japan in an effort to extend its R&D scope and promote opportunities for international cooperation around the world.