Acidic Polyester Imides as Thermally Stable Binder Polymers for Negative-Tone Black Photoresist
- 1 CCTech. Co. Ltd., Hwaseong, South Korea
- 2 School of Material Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea
- 3 Duksan Neolux Co., Ltd., Cheonan, South Korea
- 4 School of Material Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea
Abstract
Polyimides are well-known for their high chemical inertness and thermal stability. However, it is usually challenging to synthesize UV-curable polyimides since the imidization reaction requires such harsh conditions that acrylate type double bonds cannot withstand. In this work, synthetic methods are developed to obtain polyester-imide type binder polymers with high thermal stability, high compatibility with the other components of the black photoresist, and fine photolithographic patterning property for the negative-tone black photoresist. The syntheses of diimide-diacid or diimide-diol intermediates for the polyesterification with dianhydride gave polyester imides which meets this requirement. The photolithographic tests have shown that the patterning of the micron-sized PDL of the organic light emitting diode (OLED) panel could be obtained. This work will interest the researchers working on the design and optimization of thermally stable binder polymers.
- Jetly, A. and Mehra, R. (2018) Efficient Tandem Organic Light Emitting Diode Using Organic Photovoltaic Charge Generation Layer. International Journal of Optics, 2018, Article ID: 9458530. https://doi.org/10.1155/2018/9458530
- Shi, G., Park, S.H., Kim, J., Kim, M. and Park, L.S. (2018) Side-Chain Polyimides as Binder Polymers for Photolithographic Patterning of a Black Pixel Define Layer for Organic Light Emitting Diode. International Journal of Polymer Science, 2018, Article ID: 3790834. https://doi.org/10.1155/2018/3790834
- Guo, Y., Ji, Z., Zhang, Y., Wang, X. and Zhou, F. (2017) Solvent-Free and Photocurable Polyimide Inks for 3D Printing. Journal of Materials Chemistry A, 5, Article ID: 16307. https://doi.org/10.1039/C7TA01952A
- Herzberger, J., Meenakshisundaram, V., Williams, C.B. and Long, T.E. (2018) 3D Printing All-Aromatic Polyimides Using Stereolithographic 3D Printing of Polyamic Acid Salts. ACS Macro Letters, 7, 493-497. https://doi.org/10.1021/acsmacrolett.8b00126
- Dick, A.R., Bell, W.K., Luke, B., Maines, E., Mueller, B., Rawlings, B., Kohl, P.A. and Willson, C.G. (2016) High Aspect Ratio Patterning of Photosensitive Polyimide with Low Thermal Expansion Coefficient and Low Dielectric Constant. Journal of Micro/Nanolithography, MEMS, and MOEMS, 15, Article ID: 033503. https://doi.org/10.1117/1.JMM.15.3.033503
- Shi, G., Kim, J., Baek, K., Bae, J. and Park, L.S. (2019) Melt and One-Pot Solution Synthesis of Thermally Stable, Organosoluble and Photocurable Acidic Polyimides. Materials Sciences and Applications, 10, 709-720. https://doi.org/10.4236/msa.2019.1011051
- Kim, J., Park, K., Lee, D. and Bae, J.-Y. (2011) Synthesis of Fluorene-Containing Photosensitive Polymer and Its Application to the Carbon Black-Based Photoresist for LCD Color-Filter. Polymer (Korea), 35, 87-93. https://doi.org/10.7317/pk.2011.35.1.87
- Shi, G., Baek, K., Ahn, S.H., Bae, J., Kim, J. and Park, L.S. (2019) Synthesis of New Binder Polymers for Photolithographic Patterning of Black Pixel Define Layers of Organic Light Emitting Diode. Materials Sciences and Applications, 10, 687-696. https://doi.org/10.4236/msa.2019.1011049