High NA EUV Mask Technology Landscape 2026
High NA EUV Mask Technology Landscape 2026
High-NA EUV lithography at 0.55 NA targets sub-3 nm logic nodes, demanding fundamental redesigns across mask blank materials, absorber stacks, and anamorphic inspection systems. This dataset snapshot maps innovation signals across retrieved patent and literature records from 2004 through early 2026.
The Architecture and Stakes of High-NA EUV Masking
EUV mask technology relies on reflective photomask architectures because all materials absorb rather than transmit light at 13.5 nm. The functional stack comprises a low thermal expansion material substrate, a Mo/Si multilayer reflective coating, a capping layer, a tantalum-based absorber, and a low-reflectivity inspection layer. At 0.33 NA, this architecture reached production maturity by 2018–2019, with throughputs exceeding 140 wafers per hour.
The transition to 0.55 NA introduces the mask three-dimensional (M3D) shadowing effect as a critical new failure mode. The increased illumination chief ray angle and larger angular spread require absorber thickness to be minimized—targeting below 30–50 nm from the conventional ~70 nm TaBN—while maintaining reflectance uniformity over a wider angular bandwidth across the multilayer stack.
High-NA scanners employ anamorphic 4×/8× reduction optics, halving the mask field in one axis. This asymmetric imaging geometry has direct consequences for mask pattern writing, aerial image measurement system (AIMS) design, and defect tolerances. Only tools that faithfully reproduce this asymmetric illumination geometry can qualify masks for high-NA production environments.
Within this dataset, filings span 2004 through early 2026 across three maturity phases. In retrieved records, AGC Inc. leads mask blank materials with 10+ filings, KLA-Tencor leads actinic inspection with 7+ filings, and Samsung Electronics leads aerial image metrology with 8+ filings. A distinct post-2023 surge from Chinese institutional filers represents the fastest-growing geographic signal in this dataset.
Filing Trends and Technology Cluster Distribution
The retrieved dataset reveals a clear three-phase maturity arc from foundational blank architecture work (2004–2012) through productization (2013–2021) to a high-NA transition phase (2022–2026). Four primary technology clusters account for the majority of filings in this dataset: reflective mask blank and absorber engineering, actinic inspection systems, aerial image metrology, and focus monitoring and OPC methods.
Patent Filings by Technology Cluster — High-NA EUV Mask (Dataset Snapshot)
Reflective mask blank and absorber engineering is the most densely populated cluster in this dataset, driven primarily by AGC Inc. and Applied Materials, followed by actinic inspection systems led by KLA-Tencor.
↗ Click bars to exploreHigh-NA EUV Mask Filings by Phase and Jurisdiction — Dataset Snapshot
The high-NA transition phase (2022–2026) shows the sharpest increase in CN-jurisdiction filings in this dataset, contrasting with the US-dominant pattern of the foundational and productization phases.
↗ Click bars to exploreKey Application Areas for High-NA EUV Mask Technology
High-NA EUV mask technology is being developed across four principal application domains: advanced logic manufacturing at sub-3 nm nodes, DRAM and memory patterning, mask blank and substrate supply chain infrastructure, and inspection and metrology instrumentation. Each domain carries distinct mask specification requirements documented across the retrieved dataset.
Advanced Logic Semiconductor Manufacturing
Literature records document 0.33 NA EUV entering HVM for 7 nm (2019) and 5 nm (2020) logic nodes. ASML’s next-generation 0.55 NA system explicitly targets sub-3 nm logic. TSMC’s multiple mask process patents (2013–2018, US) address dual-mask EUV strategies to extend resolution for leading-edge logic patterning.
Advanced LogicDRAM and Memory Manufacturing
SEMATECH literature (2014) and ASML HVM literature (2019) both cite 16 nm DRAM as a target node for 0.33 NA EUV. Memory patterning demands extremely tight CD uniformity below 0.5 nm, driving specifications for improved mask blank flatness and defect density that differ substantially from logic mask requirements.
Memory PatterningMask Blank and Substrate Supply Chain
AGC Inc. is the dominant filer in mask blank materials with at least 8 distinct US patent filings from 2010–2024 covering absorber-layer compositions and low-reflectivity inspection layers. Shanghai Chuanxin Semiconductor filed two CN patents in 2023 covering in-situ reflectance monitoring during EUV blank deposition, signaling emergence of Chinese domestic mask blank manufacturing infrastructure.
Blank Supply ChainInspection Equipment and Metrology
KLA-Tencor holds at least 7 distinct filings across US, EP, and WO jurisdictions from 2010–2019 for high-throughput actinic inspection. RI Research Instruments GmbH’s 2023 US patent describes a plasma-based lab EUV source (12.5–14.5 nm) achieving below 50 nm spatial resolution with zone-plate optics, enabling compact lab-scale actinic inspection independent of synchrotron infrastructure.
Inspection InstrumentationKey Patent Assignees in High-NA EUV Mask Technology (Retrieved Records)
In retrieved records, AGC Inc. and Samsung Electronics account for the two largest filing counts in this dataset, with 10+ and 8+ filings respectively across mask blank materials and aerial image metrology. KLA-Tencor (7+ filings) and TSMC (6+) follow, with concentration highest in mask blank materials and actinic inspection sub-domains in this dataset.
Top Assignees by Approximate Filing Count in Retrieved Records (Dataset Snapshot)
↗ Click bars to exploreAGC Inc. (Asahi Glass Company)
AGC Inc. holds at least 10 distinct US patent filings in mask blank materials spanning 2010–2024, making it the largest single filer in this sub-domain in this dataset. Key families cover tantalum-nitrogen-hydrogen absorber compositions, low-reflectivity inspection layers with controlled reflectivity across the 400–1,200 nm window, and continuation filings through 2023–2024 addressing current HVM requirements. Multiple families remain active as continuation grants through 2024.
Japan — US, EPSamsung Electronics Co., Ltd.
Samsung Electronics holds 8+ US patent filings in aerial image metrology and EUV mask OPC spanning 2011–2023 in this dataset. The 2023 filings on anamorphic aerial image measurement for high-NA scanning EUV masks—using toroidal X-ray mirrors and anamorphic zone-plate lenses to emulate the 4×/8× scanner geometry—represent the only granted US patents specifically covering high-NA AIMS in the retrieved records. A 2021 filing covers monitoring macro frameworks for EUV exposure slit effects integrated with OPC and mask process correction workflows.
South Korea — USHigh-NA EUV Mask: Five Emerging Technology Directions
The 2022–2026 filing cohort in this dataset contains five distinct technology signals not present in earlier phases: anamorphic AIMS tools, trilayer multilayer reflectors for M3D mitigation, Chinese domestic inspection infrastructure, high-NA pellicle-mask interaction systems, and beyond-EUV (6.7 nm) anticipatory filings.
Anamorphic High-NA Aerial Image Measurement (2023)
Samsung Electronics’ two 2023 US filings constitute the clearest patent signal of infrastructure built specifically for high-NA anamorphic mask qualification. The architecture uses X-ray toroidal mirrors and anamorphic zone-plate lenses to emulate the 4×/8× scanner geometry. This architectural combination is entirely absent from any pre-2022 record in the dataset, establishing Samsung as the first mover in this sub-domain within retrieved records.
Trilayer Multilayer Reflector Stacks for M3D Mitigation (2023)
Applied Materials’ 2023 trilayer EUV reflector filings disclose Mo/Si stacks with 0.5–1.5 nm interface layers that reduce effective atomic number and expand reflectance angular bandwidth specifically for high-NA scanners. This materials approach to M3D shadowing reduction has no equivalent predecessor in the dataset’s pre-2022 filings. The filings explicitly target the M3D effect as the design driver, making them directly relevant to 0.55 NA scanner qualification.
0.33 NA vs. 0.55 NA High-NA EUV: Mask Technology Requirements
Click any row to explore further.
| Dimension | 0.33 NA EUV (Incumbent) | 0.55 NA High-NA EUV |
|---|---|---|
| Production Maturity | HVM since 2018–2019; >140 wafers/hour throughput documented | Transition phase 2022–2026; sub-3 nm node target per ASML literature |
| Reduction Optics | Isotropic 4× reduction | Anamorphic 4×/8× reduction; mask field halved in one axis |
| M3D Shadowing Risk | Manageable at ~70 nm TaBN absorber thickness | Critical failure mode; absorber must target <30–50 nm thickness |
| Absorber Specification | ~70 nm TaBN conventional; ruthenium-silicon multilayer pairs used | Sub-30 nm target per Carl Zeiss SMT EP/US specification (2013); Cu absorber at 30 nm per TSMC 2015 patent |
| Aerial Image Metrology | Symmetric AIMS tools; zone-plate EUV illumination (Samsung, 2011 US) | Anamorphic AIMS required; toroidal X-ray mirror and anamorphic zone-plate lens (Samsung, 2023 US) |
| Inspection Approach | 193 nm-based inspection supplemented by actinic; KLA-Tencor ≥100× magnification multi-mirror tool (2014 US) | Actinic inspection at 13.5 nm mandatory; zone-plate laboratory tools (RI Research Instruments, <50 nm resolution, 2023 US) |
| Multilayer Reflector Architecture | Standard Mo/Si bilayer stack; reflective plane ≤32 nm below surface (GlobalFoundries, 2015 US) | Trilayer Mo/Si with 0.5–1.5 nm interface layers reducing Zeff; wider angular bandwidth (Applied Materials, 2023 US) |
| Target Semiconductor Nodes | 7 nm (2019 HVM), 5 nm (2020 HVM), 16 nm DRAM per SEMATECH 2014 and ASML 2019 literature | Sub-3 nm logic; next-generation DRAM with <0.5 nm CD uniformity requirement |
Frequently Asked Questions: High-NA EUV Mask Technology
The mask three-dimensional (M3D) shadowing effect arises because high-NA EUV illumination has a larger angular spread at the mask surface. At 0.55 NA, absorber thickness must be minimized—targeting below 30–50 nm from the conventional ~70 nm TaBN—to reduce shadowing artifacts. Carl Zeiss SMT’s EP/US patents (2013) established the sub-30 nm absorber specification, and Applied Materials’ 2023 trilayer multilayer reflector filings explicitly target M3D reduction for high-NA scanners.
High-NA scanners use anamorphic 4×/8× reduction optics, meaning the mask field is reduced by 4× in one axis and 8× in the other. Aerial image measurement systems (AIMS) must faithfully reproduce this asymmetric illumination geometry to qualify masks. Samsung Electronics’ 2023 US patents describe an architecture using X-ray toroidal mirrors and anamorphic zone-plate lenses specifically to emulate the 4×/8× scanner geometry—a design not present in any pre-2022 dataset record.
In this dataset, AGC Inc. (formerly Asahi Glass Company) is the largest filer in mask blank materials with at least 10 distinct US patent filings from 2010–2024, covering tantalum-nitrogen-hydrogen absorber compositions and low-reflectivity inspection layers. Applied Materials is identified as the principal US-based challenger, with trilayer multilayer reflector filings in 2023 explicitly targeting high-NA requirements.
At least 5 CN-jurisdiction filings from Chinese institutional and commercial assignees appeared in 2023–2026, including Shanghai Institute of Applied Physics (synchrotron-based actinic inspection), Shanghai Chuanxin Semiconductor (in-situ reflectance monitoring during blank deposition), Sun Yat-sen University (BEUV imaging with hexagonal boron nitride scintillators), and Shenzhen Integrated Particle Facility Research Institute (EUV mask defect detection). This is described in the dataset as a coordinated national capability-building effort in EUV mask blank manufacturing and actinic inspection.
Beyond-EUV (BEUV) refers to lithography at 6.7 nm wavelength, the next wavelength node beyond EUV’s 13.5 nm. In this dataset, ESOL Inc. (2024, US) and Sun Yat-sen University (2026, CN) explicitly reference BEUV as a design target in their mask inspection and imaging detector filings. The patent landscape for BEUV mask blank compositions, absorber materials, and inspection optics is described as largely unoccupied, representing an early-filing window.
Both are highly concentrated in this dataset. Mask blank materials are concentrated around AGC Inc. globally and Applied Materials as the US challenger. Actinic inspection is concentrated around KLA-Tencor (7+ filings, high-throughput production tools across US, EP, WO) and Lasertec (Japan, 2011–2019). New entrants such as ESOL Inc. and RI Research Instruments GmbH are carving out zone-plate-optic laboratory segments rather than competing on high-throughput production tools. Chinese institutional entrants are targeting synchrotron-based R&D tools as a lower-barrier entry point.
Data and insights on this page are based on a limited patent and literature dataset and are for reference only. Figures may not represent the complete technology landscape.