EUV and Immersion Lithography
Advanced lithography depends on the combined performance of EUV and immersion processes, where yield is increasingly limited by variability that standard controls do not fully capture.
Closing the Variability Gap in EUV and Immersion Lithography
EUV defines the most advanced layers, while immersion drives most exposures and cumulative variation. Across both, conditions can shift at the moment of exposure, introducing photochemical interactions, molecular contamination, fluid instabilities, and reticle environment effects that are difficult to detect and control. This creates a gap between nominal process control and actual imaging conditions, impacting yield and requiring tighter integration across filtration, fluid handling, and mask protection.
Revisiting Particle Generation in EUV Reticle Pods
EUV adoption and the shift to High NA EUV introduce new sources of variation that affect lithography yield, increasing the need for contamination control during reticle handling.
What Ten Years of Photochemical Purification Taught Us About Preventing Lithography Defects
This paper examines a decade of photochemical purification, showing how dissolved metals, polymer chemistry, and advanced membranes help reduce lithography defects.
Simulating Gas-Phase Contamination Distribution in Cleanroom Environments
This paper demonstrates how cleanroom airflow, AMC filtration coverage, and tool layout create localized contamination hotspots, providing insights for optimizing contamination control and filtration strategies.
EUV Enablement: Solving Defect Challenges
Learn why extreme ultraviolet (EUV) lithography is replacing 193 nm immersion (193i) lithography for more and more critical chip layers, and how relying on improved filtration methods can help reduce defects.