ASML
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The ASML URS 5000 / 55 B is a stepper. The ASML URS 5000 / 55 B supports 6-inch wafers.[1]

The ASML URS 5000 55 B is a stepper, a type of photolithography system used in semiconductor manufacturing to transfer circuit patterns onto wafer substrates.
As a stepper, the ASML URS 5000 55 B uses a projection lens to image a reticle pattern onto a single die or field at a time. The wafer is then stepped to the next position and exposed again, repeating until the entire wafer is patterned.
Alignment systems in steppers such as the URS 5000 55 B ensure that each exposure layer is precisely registered to previous layers on the wafer.
The ASML URS 5000 55 B is used in the photolithography stage of wafer fabrication, which occurs after the wafer has been coated with photoresist and before the resist is developed.
Lithography systems like the URS 5000 55 B are typically positioned after wafer cleaning and deposition steps and before etch or ion implantation processes.
The ASML URS 5000 55 B is applied in the fabrication of integrated circuits, where it defines critical device features on silicon wafers.
Steppers of this class are also used in the production of microelectromechanical systems and other semiconductor devices that require photolithographic patterning.
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The following facts about the URS 5000 55 B are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the URS 5000 55 B are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the URS 5000 55 B are on record.
Answerable by: an OEM product catalog or an engineer who ordered or specified the tool
The control-system platform and OS era of the URS 5000 55 B are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the URS 5000 55 B are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the URS 5000 55 B is not on record.
Answerable by: an OEM datasheet or a fab qualification report
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Last updated Sep 28, 2026.
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