Definition
A DUV immersion scanner projects a reduced reticle image through a lens and controlled liquid layer onto photoresist while synchronizing reticle and wafer stages, focus, dose, alignment, and overlay corrections across each exposure field.
Process position
Inputs
- Coated wafer
- Qualified reticle
- Exposure recipe
- Alignment and correction data
Outputs
- Exposed resist image
- Scanner telemetry
- Dose, focus, and overlay records
How it works
- 01Load and align wafer and reticle
- 02Establish focus and leveling map
- 03Apply dose and overlay corrections
- 04Scan and expose fields
- 05Verify telemetry and unload
Role in the production flow
The scanner is one part of a lithography cell that also includes resist processing, reticle control, computational corrections, and downstream metrology. Pattern quality depends on the integrated cell rather than scanner resolution alone.
A projection lithography system that uses deep-ultraviolet light and immersion fluid to transfer reticle patterns into wafer photoresist at production scale.
Boundary: The cited manufacturers document the equipment category and its intended uses; this record does not independently validate vendor performance claims or rank products.
Qualification and production boundaries
A production fit requires matching wavelength, numerical aperture, field size, overlay budget, resist stack, multipatterning flow, throughput, scanner matching, and the available correction and metrology loop.
A production fit requires matching wavelength, numerical aperture, field size, overlay budget, resist stack, multipatterning flow, throughput, scanner matching, and the available correction and metrology loop.
Boundary: Actual acceptance limits, recipes, throughput, availability, and ownership economics are product-, process-, site-, and contract-specific.
Sources
Citations support the tagged claims above. Access dates record when Maha Strategies last checked the public source.
- [1]DUV Lithography Systems · ASML · accessed 2026-08-24
- [2]Lithography principles · ASML · accessed 2026-08-13
- [3]The Rayleigh criterion for resolution · ASML · accessed 2026-08-13