To overcome the limitations of EUV lithography in reducing mask size and performing stitching, ASML and TSMC have jointly launched an industry initiative to promote the use of 12-inch photomasks. The plan aims to improve wafer fab productivity by restoring a complete exposure field, meeting the demand for chips at smaller process nodes driven by AI. Currently, 6-inch masks are still used for EUV with high numerical aperture, but both companies plan to establish a 12-inch photomask pilot production line by 2031 and prepare corresponding lithography systems for advanced process production by 2033. Intel and Samsung have expressed their support for this transition.