As per the most recent research report, mainland Chinese wafer fabrication companies have, in recent years, been persistently acquiring immersion DUV lithography equipment, notwithstanding the export restrictions imposed on EUV lithography machines. This has led to the accumulation of a substantial reserve of advanced lithography capabilities. The quantity of these machines is adequate to sustain a certain scale of 7-nanometer chip production, which could potentially undermine the efficacy of the current export control measures.
