An Efficient Spraying Method with Cyclodextrine‐drived Aqueous Stripper for Removing of Organic Photoresist on Indium Tin Oxide Surface

• Published in: Bulletin of the Korean Chemical Society Vol. 39; no. 10; pp. 1198 - 1205
• Main Authors: Kim, Joon Hyun, Lee, Ki‐Seong, Jeong, Byung Hyun, Lee, Dae Won, Hong, Sung‐Jei, Kim, Young Sung
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley‐VCH Verlag GmbH & Co. KGaA 01.10.2018; 대한화학회
• Subjects: Aqueous stripper; Full‐cone nozzle; ITO‐glass; Positive photoresist; Removal process; Spray; 화학
• ISSN: 1229-5949; 0253-2964; 1229-5949
• DOI: 10.1002/bkcs.11576

The chemical mechanism of inducing polymer breakage in a photoresist layer plays an important role in the photoresist removal from an indium tin oxide substrate. The spray structure for delivering the relevant functional material is involved in the process of binding and dissolving the PR (photoresist) material. This presents an efficient spraying process of removing the photoresist layer formed on a 260‐nm‐thick indium tin oxide substrate with a CD (cyclodextrine)‐drived aqueous stripper, simultaneously implementing proper mass transfer and heat transfer. It was taken to achieve an economical stripper consumption management by limiting the modified Weber number to 200 and the spray distance to 100 mm. As a result, stable removal performance was achieved, with optical and electric properties varying within the range of 1%, in CD drived aqueous stripping conditions (water content of the stripper composition ≤71%, stripper temperature = 40°C, and stripping time = 40 s).