Exploration of UPE membrane technology in point-of-use EUV CAR photoresist filtration

The relentless advancement of Extreme Ultraviolet (EUV) lithography has ushered in the integration of high Numerical Aperture (NA) EUV technology, enabling the fabrication of cutting-edge semiconductor devices at 5 nm and beyond. With increased device scaling, the complexity of lithographic processes has grown, necessitating the development of innovative materials and optimized patterning techniques to mitigate the stochastic challenges inherent in EUV lithography. Alongside material innovation, defect reduction through advanced filtration at the Point of Use (POU) has emerged as a critical enabler for achieving the desired yield and performance in high -NA EUV processes. The findings presented in this study underscore the transformative potential of our filtration advancements for the semiconductor industry, focusing on the development and optimization of a novel Ultrahigh Molecular Weight Polyethylene (UPE) filter specifically designed to meet the stringent defectivity requirements of EUV Chemically Amplified Resists (CAR) toward the upcoming high-NA EUV lithography. The paper concludes with strategic recommendations for implementing these advanced filtration solutions to bolster the semiconductor industry’s push toward ever-smaller node manufacturing and highlights the indispensable role of filtration technology in advancing EUV lithography.