FinFET Etching Process Patent Landscape 2026
FinFET Etching Process Patent Landscape in 2026
The FinFET etching process patent space is highly concentrated, with Taiwan Semiconductor Manufacturing Co. holding a commanding lead among the hundred largest filers, and the field now in a post-peak decline phase after reaching maximum annual filing volume in 2017. Activity remains dominated by a small cluster of integrated device manufacturers and foundries, leaving limited room for new entrants at the core technology level.
TSMC leads a tightly held field with four players controlling the top tier
Taiwan Semiconductor Manufacturing Co. ranks first among the hundred largest filers and has built a substantial lead over all challengers, reflecting its role as the primary commercial driver of FinFET etching process innovation. The top five filers collectively account for 70% of the combined patent records of the hundred largest filers, confirming a strongly consolidated competitive structure.
The tier gap between the leader and its nearest rivals is pronounced: GlobalFoundries and IBM follow at positions two and three, but neither approaches the volume held by TSMC. Below the top five, filer counts drop off sharply, indicating that a handful of organizations have absorbed the bulk of patent activity in this domain.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Taiwan Semiconductor Manufacturing Co., Ltd. | 554 | |
| 2 | GlobalFoundries US Inc. | 185 | |
| 3 | International Business Machines Corporation | 153 | |
| 4 | GlobalFoundries Inc. | 79 | |
| 5 | Adeia Semiconductor Solutions LLC | 59 | |
| 6 | Semiconductor Manufacturing International (Shanghai) Corporation | 47 | |
| 7 | Applied Materials, Inc. | 47 | |
| 8 | Alsephina Innovations Inc. | 31 | |
| 9 | Semiconductor Manufacturing International (Beijing) Corporation | 28 | |
| 10 | Elpis Technologies Inc. | 28 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Institute of Microelectronics, Chinese Academy of Sciences | 22 | |
| 12 | Lam Research Corporation | 20 | |
| 13 | STMicroelectronics Inc. | 15 | |
| 14 | United Microelectronics Corporation | 12 | |
| 15 | Varian Semiconductor Equipment Associates, Inc. | 12 | |
| 16 | Bell Semiconductor LLC | 12 | |
| 17 | Auriga Innovations Inc. | 9 | |
| 18 | Shanghai Huali Integrated Circuit Corporation | 9 | |
| 19 | Peking University | 8 | |
| 20 | Robert Bosch GmbH | 7 |
The leaders’ positions imply that core FinFET etching techniques are well-staked by integrated foundries and device manufacturers. Newcomers or equipment suppliers seeking freedom to operate will need to identify narrower sub-process niches or adjacent application areas not yet densely covered by the incumbents.
Filings from approximately 2024 onward are subject to publication lag and will undercount actual recent activity; the apparent drop in those years should not be interpreted as confirming further acceleration of the decline.
Filing volume peaked in 2017 and has contracted sharply; semiconductor device classes dominate the technology mix
Two charts below capture the temporal trajectory of FinFET etching process filings and the distribution of technology classes across the corpus, together showing a mature, consolidating field concentrated in a single dominant IPC branch.
Annual filing trend
Filing activity peaked in 2017 and has contracted steadily since, with the multi-year window showing a recent-growth figure of -63% relative to the prior period. The lifecycle is characterized as declining, with annual volume having eased substantially from the 2017 peak. Figures for 2024 and 2025 are incomplete due to publication lag and should be read as floors, not final counts.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01L (Semiconductor devices) overwhelmingly dominates the technology mix, reflecting the device-centric nature of FinFET etching process patents. H10D (Semiconductor devices, general) and H10B (Memory device manufacture) represent the next largest branches, while process-adjacent classes such as C23C (Coating and surface deposition) and H01J (Electron and discharge tubes) each account for a small share, signaling limited but potentially under-served coverage in equipment and process chemistry.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
FinFET Transistor Cut Etching Process Method
The present disclosure discloses a FinFET transistor cut etching process method, comprising: step 1, forming a first photoresist pattern to define a cut etching region of the FinFET transistor; step 2, forming a second amorphous semiconductor pattern; step 3, forming a first dielectric layer and a first groove; step 4, forming a second dielectric layer that… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Finfet structure and method for manufacturing ther… | 534 |
| 2 | GCIB etching method for adjusting fin height of fi… | 473 |
| 3 | Multiple fin formation | 327 |
| 4 | Double spacer FinFET formation | 281 |
| 5 | Method for forming multiple fins in a semiconducto… | 195 |
| 6 | Finfet and method of fabricating the same | 181 |
| 7 | Methods of forming single and double diffusion bre… | 160 |
| 8 | Process for fabrication of FinFETs | 139 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the competitive structure means for R&D investment decisions
The combination of a declining lifecycle, extreme concentration among foundry leaders, and narrow geographic spread shapes the strategic options available to R&D teams entering or expanding in FinFET etching. Each dimension below points to a distinct investment consideration.
Field is in decline after a 2017 peak
The lifecycle stage is classified as Decline, with annual filings having eased back from the 2017 peak. On the most recent multi-year window the corpus shows a –63% contraction, indicating that core FinFET etching process claims are largely staked. R&D investment in this space is most defensible when directed at differentiated sub-processes or next-generation architectures (e.g., gate-all-around transitions) rather than the central fin etch techniques.
Lifecycle: DeclineTop five filers hold 70% of the leading-100 share
The top five filers — TSMC, GlobalFoundries US, IBM, GlobalFoundries Inc., and Adeia Semiconductor Solutions — together represent 70% of the combined patent records among the hundred largest filers. This degree of concentration means that freedom-to-operate analysis is essential before committing to process development in the core fin-etch space. Equipment and materials suppliers in the mid-tier (Applied Materials, Lam Research) hold smaller but strategically relevant positions.
High concentrationIBM–GlobalFoundries alliance is the dominant co-filing pair
The most active co-applicant pairing is IBM (International Business Machines) and GlobalFoundries, with 49 jointly filed patent records — substantially more than any other pair. SMIC Shanghai and SMIC Beijing form the second-largest collaboration with 28 joint records, reflecting coordinated IP strategy within that organization. GlobalFoundries and GlobalFoundries US also show meaningful overlap (16 records), likely reflecting corporate entity restructuring. STMicroelectronics appears as a secondary collaboration partner for both IBM and GlobalFoundries.
Co-filing clustersUS jurisdiction captures the majority of filings; China is the second filing destination
The United States is the leading filing jurisdiction by a wide margin, followed by China, Taiwan, and South Korea. PCT and EPO filings are comparatively limited, suggesting that most applicants have prioritized national direct filings in manufacturing-relevant markets rather than broad international prosecution. Entrants with differentiated technology should assess whether the relatively sparse EPO and PCT coverage represents an accessible protection gap.
US-centric filingGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| International Business Machines Corporation | GlobalFoundries Inc. | 49 |
| Semiconductor Manufacturing International (Shanghai) Corporation | Semiconductor Manufacturing International (Beijing) Corporation | 28 |
| GlobalFoundries Inc. | GlobalFoundries US Inc. | 16 |
| GlobalFoundries Inc. | STMicroelectronics Inc. | 6 |
| International Business Machines Corporation | STMicroelectronics Inc. | 3 |
| International Business Machines Corporation | Renesas Electronics Corporation | 1 |
| International Business Machines Corporation | GlobalFoundries US Inc. | 1 |
| International Business Machines Corporation | International Business Machines (China) Co., Ltd. | 1 |
| GlobalFoundries Inc. | Renesas Electronics Corporation | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
TSMC leads on volume; IBM and GlobalFoundries are the closest challengers with a strong co-filing history
The applicant ranking reveals a two-tier structure: TSMC at the top with a large lead, and a second tier of foundry and IDM players whose activity has declined sharply in recent years. Equipment suppliers occupy a distinct, smaller tier.
Taiwan Semiconductor Manufacturing Co.
TSMC holds 554 patent records in the FinFET etching process ranking, far exceeding all other filers. Its technology focus is concentrated in H01L 21, H01L 29, and H01L 27 — covering semiconductor device fabrication processes, device structures, and integrated circuits respectively — reflecting a comprehensive, process-to-device coverage strategy. Recent momentum shows a –67% decline versus the prior three-year period, consistent with the field-wide post-peak contraction rather than any unique withdrawal.
554 patent recordsInternational Business Machines Corporation
IBM ranks third overall with 153 patent records and shares a dominant co-filing relationship with GlobalFoundries (49 joint records), making the effective IBM–GlobalFoundries alliance the most significant collaborative block in the corpus. IBM’s technology emphasis mirrors TSMC’s, concentrated in H01L 21, H01L 29, and H01L 27, but at lower absolute volume. Recent momentum shows a steep –83% decline, indicating that IBM has substantially reduced new FinFET etching process prosecution, consistent with its broader exit from semiconductor manufacturing.
153 patent records| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Taiwan Semiconductor Manufacturing Co., Ltd. | 62 | ▼ -67% |
| International Business Machines Corporation | 3 | ▼ -83% |
| Applied Materials, Inc. | 1 | ▼ -95% |
| Lam Research Corporation | 3 | ▲ new entrant |
Memory device manufacture and surface deposition are under-served relative to the dominant device class
Several IPC branches adjacent to the dominant H01L semiconductor device class show meaningful patent record counts but small shares of the overall corpus, indicating that their intersection with FinFET etching process techniques is comparatively sparse. These are observations of relative sparsity; entry-path viability depends on additional technical and commercial due diligence.
H10B · Memory device manufacture
With 104 patent records and a 6% share of the corpus, H10B represents the largest adjacent branch but remains well below the dominant H01L class. FinFET etching as applied specifically to memory cell architectures — including embedded SRAM in logic processes and 3D NAND fin-based structures — is an area where the intersection with etching process specifics appears under-documented relative to its commercial relevance. Teams working on memory-logic integration or process-compatible memory modules may find relatively less crowded prior art in this sub-domain.
Search this in Eureka →C23C · Coating and surface deposition
C23C (Coating and surface deposition) accounts for only 13 patent records and a 1% share of the corpus, despite the direct relevance of atomic layer deposition and conformal thin-film processes to fin surface passivation and spacer formation in FinFET flows. This sparsity may reflect that equipment and materials suppliers are filing under device-centric codes rather than process-chemistry codes, or it may represent a genuinely under-protected area at the chemistry-process interface. Suppliers of deposition precursors or ALD equipment could evaluate whether their specific FinFET-enabling chemistry is adequately protected here.
Search this in Eureka →How leading filers differ across FinFET etching technology routes
Strength of each leader across the main technology routes.
| Player | H01L 21 · Semiconductor devices | H01L 29 · Semiconductor devices | H01L 27 · Semiconductor devices | H10D 84 · Semiconductor devices (general) | H10D 62 · Semiconductor devices (general) |
|---|---|---|---|---|---|
| Taiwan Semiconductor Manufacturing Co., Ltd. | Strong · 546 | Strong · 462 | Strong · 280 | Emerging · 88 | Emerging · 75 |
| International Business Machines Corporation | Strong · 259 | Strong · 233 | Strong · 132 | Emerging · 28 | Emerging · 29 |
| GlobalFoundries Inc. | Strong · 230 | Strong · 187 | Moderate · 85 | Emerging · 23 | Emerging · 18 |
| Semiconductor Manufacturing International (Shanghai) Corporation | Strong · 47 | Strong · 43 | Strong · 26 | Absent | Absent |
| Applied Materials, Inc. | Strong · 47 | Strong · 33 | Absent | Moderate · 11 | Moderate · 16 |
| Semiconductor Manufacturing International (Beijing) Corporation | Strong · 28 | Strong · 28 | Moderate · 14 | Absent | Absent |
| STMicroelectronics Inc. | Strong · 17 | Strong · 18 | Moderate · 9 | Emerging · 1 | Emerging · 2 |
Frequently asked questions
The corpus contains 712 patent families in scope for FinFET etching process technology, representing the broadest measure of unique inventive families identified across global jurisdictions.
Taiwan Semiconductor Manufacturing Co. (TSMC) is the leading filer, holding 554 patent records in the ranking of the top hundred applicants — substantially ahead of GlobalFoundries US (185 records) and IBM (153 records).
No. The field is classified as Decline, with annual filing volume having eased back from its 2017 peak. The most recent multi-year window shows a -63% contraction. Figures for 2024 and 2025 are incomplete due to publication lag, but the overall downward trajectory from 2017 is clear.
The United States is the dominant filing jurisdiction by a wide margin, followed by China, Taiwan, and South Korea. PCT and EPO filings are comparatively limited, suggesting filers have prioritized direct national filings in key manufacturing markets.
IBM and GlobalFoundries form the most active co-applicant pair with 49 jointly filed patent records. SMIC Shanghai and SMIC Beijing follow with 28 joint records. GlobalFoundries and STMicroelectronics also appear as notable co-filers, with 6 joint records.
Two adjacent IPC branches show relatively sparse coverage: H10B (Memory device manufacture) with 104 patent records and a 6% share, and C23C (Coating and surface deposition) with only 13 patent records and a 1% share. These represent observations of relative sparsity at the intersection with FinFET etching; whether they constitute actionable opportunities requires additional technical and freedom-to-operate analysis.
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Disclaimer. This page is generated from PatSnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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