ACM Research Delivers Advanced Ultra Lith BK Photoresist Hardening Tool with Industry-Leading UV Curing and Temperature Uniformity

Ultra Lith BK delivers exceptional uniformity and flexible processing capabilities to enhance process stability, yield, and scalability in advanced lithography

MUNICH, Nov. 19, 2025 (GLOBE NEWSWIRE) — SEMICON EUROPA – ACM Research, Inc. (“ACM”) (NASDAQ: ACMR), a leading supplier of wafer and panel processing solutions for semiconductor and advanced packaging applications, today announced the delivery of its first Ultra Lith Baker (“Ultra Lith BK”) system to a leading global display panel manufacturer. The system is engineered to address industry-wide challenges in advanced lithography, including process non-uniformity, thermal drift, and critical dimension (“CD”) variation. It can also help semiconductor manufacturers maintain stable yield and pattern fidelity as device geometries continue to shrink. With industry-leading ultraviolet (“UV”) curing uniformity and precision temperature control, the Ultra Lith BK enables highly stable and repeatable lithography processes.

The Ultra Lith BK’s UV curing system delivers ±5% UV intensity uniformity, ensuring consistent resist hardening across the wafer. The system supports line-scan, rotary, and hybrid UV-curing exposure modes to maximize process flexibility. Its advanced thermal management architecture further reduces CD variation, overlay error, and pattern distortion—all critical to yield improvement and long-term process reliability.

“As lithography continues to push the limits of precision, maintaining uniform process control is essential for consistent yield and device performance,” said Dr. David Wang, President and Chief Executive Officer of ACM. “The delivery of the Ultra Lith BK marks a key milestone as the first customer deployment of our Track series following earlier demonstration and validation. It also marks our entry into display panel customers, a new segment with high-volume mass-production capabilities and elevated expectations for equipment performance and stability. The Ultra Lith BK combines high uniformity with a configurable system architecture, and multiple exposure modes to help customers minimize variability and scale production for future technology nodes.”

About the Ultra Lith BK

The Ultra Lith BK integrates six cold plates delivering temperature uniformity of ±0.1°C. The system adopts a configurable design and can accommodate up to 32 hotplates and two UV curing systems, enabling customers to flexibly configure the tool according to different process recipes and photoresist integration requirements. Two types of hotplates are available:

• The high-flow hotplate achieves a maximum process temperature of 250°C with temperature uniformity ≤ 0.2%.
• The low-flow hotplate operates at temperatures up to 180°C with temperature uniformity ≤ 0.08%, offering benchmark-level performance in the industry.

To learn more about the Ultra Lith BK platform, schedule a meeting with ACM at booth C1129 at SEMICON Europa, November 18-21, Messe München, or visit our website.

Forward-Looking Statements

Certain statements contained in this press release are not historical facts and may be forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Words such as “plans,” “expects,” “believes,” “anticipates,” “designed,” and similar words are intended to identify forward-looking statements. Forward-looking statements are based on ACM management’s current expectations and beliefs and involve a number of risks and uncertainties that are difficult to predict and that could cause actual results to differ materially from those stated or implied by the forward-looking statements. A description of certain of these risks, uncertainties and other matters can be found in filings ACM makes with the U.S. Securities and Exchange Commission, all of which are available at www.sec.gov. Because forward-looking statements involve risks and uncertainties, actual results and events may differ materially from results and events currently expected by ACM. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. ACM undertakes no obligation to publicly update these forward-looking statements to reflect events or circumstances that occur after the date hereof or to reflect any change in its expectations with regard to these forward-looking statements or the occurrence of unanticipated events.

About ACM Research, Inc.

ACM develops, manufactures and sells semiconductor process equipment spanning cleaning, electroplating, stress-free polishing, vertical furnace processes, track, PECVD, and wafer- and panel-level packaging tools, enabling advanced and semi-critical semiconductor device manufacturing. ACM is committed to delivering customized, high-performance, cost-effective process solutions that semiconductor manufacturers can use in numerous manufacturing steps to improve productivity and product yield. For more information, visit www.acmr.com.

© ACM Research, Inc. Ultra Lith and the ACM Research logo are trademarks of ACM Research, Inc. For convenience, these trademarks appear in this press release without ™ symbols, but that practice does not mean ACM will not assert, to the fullest extent under applicable law, its rights to such trademarks. All other trademarks are the property of their respective owners.