ASML Unveils Lithography Accuracy Measurement Technology: The Key to Nanometer Control

ASML has published a technical article detailing the critical principles of "measuring accuracy" in its lithography technology. The article states that in chip manufacturing, lithography machines must transfer circuit patterns onto silicon wafers with extreme precision, and measurement is the foundation for achieving this accuracy. ASML ensures precision through its unique "alignment" and "overlay" measurement systems. The alignment system ensures precise alignment between the silicon wafer and the mask, while overlay measurement is used to assess the pattern registration accuracy between consecutive lithography layers, which is crucial for manufacturing complex 3D structures. ASML's technology can achieve sub-nanometer measurement accuracy, a core capability that continuously drives the miniaturization of chip processes (such as the evolution towards 3nm nodes and beyond). This technology is an indispensable part of ASML's advanced equipment like Extreme Ultraviolet (EUV) lithography machines, ensuring consistency and yield in mass production.

**Comment**: By delving into its fundamental measurement technology, ASML once again highlights its technical moat in the semiconductor equipment field. Sub-nanometer measurement and control capabilities are the invisible cornerstone enabling the continuation of Moore's Law. For chip manufacturers and material/metrology equipment suppliers, paying attention to the evolution of such underlying precision technologies is key to anticipating the feasibility and challenges of advanced process node implementation.