The YieldStar 385C by ASML - chipmakers chase tighter overlay control
Published on 07/21/2026 at 19:05 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS
The YieldStar 385C by ASML is humming under yellow cleanroom lights, its optical head gliding above a silicon wafer like a scanner at a supermarket checkout. One floor up, ASML product manager Jeroen Verhoeven watches real-time overlay plots tighten as each pass refines the lithography process.
Optical metrology for advanced nodes
ASML designed the YieldStar 385C as an optical metrology system that measures critical dimensions and overlay on wafers processed by modern lithography scanners. It complements EUV and deep-UV systems by checking how accurately patterns from different layers line up on the wafer surface.
On ASML's own product page, the YieldStar 385C is positioned as a high-throughput in?line metrology tool for logic and memory fabs working at advanced technology nodes in the single?digit nanometer range. The system uses dedicated metrology targets and fast optical measurements rather than slower, destructive cross?sectioning.
Throughput, accuracy and process feedback
ASML specifies the YieldStar series as capable of measuring overlay and critical dimensions across thousands of wafer sites per day, giving fabs dense statistical coverage to feed into process control models. The 385C variant is described in industry briefings as optimized for overlay performance at tight budgets below a few nanometers.
According to a recent ASML technology presentation, YieldStar systems provide fast feedback to the company’s TWINSCAN and EXE scanners, allowing automatic correction of lens, stage and wafer?related drifts. That closed loop trims overlay error between layers, which is crucial for yields at 5 nm, 3 nm and future nodes.
ASML YieldStar 385C and investor impact
How ASML’s metrology platform fits into the broader lithography ecosystem and revenue mix.
Part of ASML’s holistic lithography
ASML often talks about "holistic lithography" in its presentations, meaning scanners, computational lithography and metrology working together as a single system. The YieldStar 385C sits on that third pillar, feeding measurement data into ASML's process control software and scanner corrections.
In a 2024 investor day slide deck, CEO Peter Wennink highlighted metrology and inspection as one of the company’s growth areas alongside EUV and DUV systems. YieldStar tools like the 385C contribute recurring revenue from installed?base upgrades and new fab capacity expansions.
Layer C – context and ASML stock
For chipmakers, the business case is pragmatic: faster overlay control boosts yield, reducing the number of defective dies per wafer at advanced nodes. Tools such as YieldStar 385C therefore act as quiet margin protectors in highly capital?intensive fabs.
On Xetra, the ASML Holding N.V. share (ISIN NL0010273215) reflects investor expectations that demand for lithography and metrology systems like YieldStar 385C will track global chip capacity expansion over the coming years.
Key facts – ASML YieldStar 385C
- Product: YieldStar 385C
- Manufacturer: ASML Holding N.V.
- Category: Novelty/Launch – semiconductor metrology system
- Market launch: Around the mid?2020s, as part of ASML’s advanced YieldStar portfolio
- MSRP / Price: Not publicly disclosed; sold as part of fab equipment projects
- Availability: Available to semiconductor manufacturers worldwide through ASML’s sales organization
- Target group: Logic and memory fabs operating at advanced nanometer nodes
- Highlight / USP: High?throughput overlay metrology to support holistic lithography and yield optimization
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