Electroplating Patents: Leaders, Trends & White Space 2026
- Filings have flattened, not grown. Annual publications fell from 409 in 2017 to a 2021 peak of 437, then eased back toward 385 by 2022 — a mature, not expanding, filing base.
- The claim space sits almost entirely inside one IPC subclass. 17,272 of 17,402 records carry a C25D classification, with semiconductor (H01L), PCB (H05K) and coating (C23C) crossovers trailing well behind.
- Several long-standing filers went quiet in the latest year. Multiple established assignees, including Atotech and IBM, show zero filings in the most recent year — a signal worth checking against continuation and licensing activity, not assuming exit.
What this landscape covers
Electroplating and surface finishing patents in this dataset centre on bath composition, current density, throwing power, brightener chemistry and thickness uniformity — the working variables that separate a plating process that scales in production from one that only works on a lab coupon. The search spans C25D3, C25D5 and C25D7, the IPC subclasses covering electroplating and electroforming apparatus and processes, and pulls in adjacent filings wherever those claims touch printed circuits, semiconductor interconnect, alloy coatings or battery electrodes.
Because publication typically lags filing by around 18 months, the most recent one to two years in any trend chart will always understate real filing activity; treat the tail of the curve as a floor, not a ceiling.
Filing trend and technology composition
17,402 patent families were published against this search across the 2015–2026 window, concentrated overwhelmingly in a single IPC subclass with a handful of adjacent crossovers.
A flat-to-declining filing curve
Filings ran at 409 in 2017, climbed to a peak of 437 in 2021, and had eased to 385 by the 2022 midpoint — the shape of a mature filing base rather than one still expanding, though the most recent years are understated by publication lag.
Concentration inside C25D
17,272 of the 17,402 records sit in C25D (electroplating and electroforming), dwarfing the next largest crossovers: H05K (printed circuits, 1,562), H01L (semiconductor devices, 1,433), C23C (coating and surface deposition, 1,385), C22C (alloys, 432) and B32B (laminates, 389). Battery-electrode crossover under H01M sits smaller still at 314.
Shares are the percentage of the 17,402 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Electroplating and Surface Finishing with Eureka
This page is one run against one query. Ask Eureka your own question about electroplating and surface finishing and every answer comes back with the patent numbers behind it.
Try EurekaA representative bath-composition patent
Acidic zinc and zinc-nickel alloy plating bath composition and electroplating method
The present invention relates to an acidic zinc or zinc-nickel alloy plating bath composition comprising a source for zinc ions, optionally a source for nickel ions, a source for chloride ions and at least one dithiocarbamyl alkyl sulfonic acid or salt thereof. Said plating bath composition and the corresponding plating method result in zinc or zinc-nickel alloy layers having an improved throwing power and thickness distribution, particularly when plating substrates having a complex shape and/or in rack-and-barrel plating.Filed by Atotech Deutschland; published 2017-09-28 as US20170275774A1.
View full record| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6027630A | Method for electrochemical fabrication | 637 |
| 2 | US5827602A | Hydrophobic ionic liquids | 618 |
| 3 | US6416647B1 | Electro-chemical deposition cell for face-up processing of single semiconductor substrates | 481 |
| 4 | US5972192A | Pulse electroplating copper or copper alloys | 431 |
| 5 | US6156167A | Clamshell apparatus for electrochemically treating semiconductor wafers | 419 |
| 6 | US6261433B1 | Electro-chemical deposition system and method of electroplating on substrates | 418 |
| 7 | US6140234A | Method to selectively fill recesses with conductive metal | 405 |
| 8 | US6251236B1 | Cathode contact ring for electrochemical deposition | 369 |
| 9 | US4304641A | Rotary electroplating cell with controlled current distribution | 335 |
| 10 | US20080223725A1 | Process chamber component having electroplated yttrium containing coating | 319 |
Citation counts favour older records simply by virtue of being searchable longer; read them as a measure of influence within this corpus, not of current commercial relevance.
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Browse MCP servers →What the filing pattern tells a technical reader
The data points to a field where the core bath-chemistry claim space is thoroughly occupied and growth has shifted to crossover applications rather than new core chemistry.
Peak has passed, not arrived
The 2021 peak of 437 filings followed by a pullback to 385 in 2022 suggests the core bath-composition and current-density claim space reached saturation before this decade's midpoint. New entrants filing broad composition claims now face a denser prior-art wall than filers did five years earlier.
One subclass, most of the field
Electroplating and electroforming (C25D) accounts for nearly the entire corpus. The next-largest crossovers — printed circuits, semiconductor devices and coating deposition — are each an order of magnitude smaller, meaning most competitive activity is happening inside a single, narrow classification rather than spreading across the periphery.
Established filers have gone quiet
Several long-running assignees — including a major specialty chemicals filer and a major electronics manufacturer — show zero filings in the most recent year, one with a reported -100% year-on-year change. This can mean consolidation of filing strategy, portfolio maturity, or a shift to trade-secret protection for newer bath formulations rather than an actual exit from the technology.
Filing follows manufacturing geography
The United States leads receiving-office volume, followed by Japan, China, the EPO and the United Kingdom, with WIPO PCT filings trailing at 800. That spread tracks where plating-line manufacturing and semiconductor back-end processing are concentrated rather than any single dominant jurisdiction.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to electroplating and surface finishing, with the prior art for and against each one.
Who holds the claim space, and where it thins out
A small set of specialty-chemicals and electronics manufacturers account for the densest filing activity, with co-assignee pairings pointing to long-running supplier-customer or joint-development relationships rather than one-off collaborations.
Electronic-materials pairings dominate co-filing
The strongest co-assignee relationship in the dataset links an electronic-materials supplier with its parent technology group at 97 shared families, well ahead of the next pairing at 59. These durable pairings usually reflect a formulation house filing jointly with a corporate or JV partner rather than incidental overlap.
Momentum has shifted away from the historic leaders
Assignees that built large historic portfolios in bath chemistry and current-density control show flat or negative recent-year momentum. That does not necessarily mean less R&D investment; it can also reflect a shift toward trade-secret protection for brightener and additive formulations, which are notoriously hard to reverse-engineer from a plated part.
No single office dominates outright
With the US, Japan, China, EPO, UK and WIPO PCT all carrying four-figure or near four-figure volumes, filers are protecting plating chemistry across every major manufacturing region rather than concentrating in one jurisdiction, consistent with a globally distributed supply chain for plated components.
| Assignee | Recent year | YoY |
|---|---|---|
| Rohm and Haas Electronic Materials LLC | 0 | — |
| BASF SE | 0 | -100% |
| International Business Machines Corporation (IBM) | 0 | — |
| Atotech Deutschland GmbH | 0 | — |
| Nippon Steel Corporation | 0 | — |
| M&T Chemicals, Inc. | 0 | — |
| Kawasaki Steel Corporation | 0 | — |
| Sumitomo Metal Industries, Ltd. | 0 | — |
Where to take this analysis
The filing data narrows down where to look; the next step is reading the actual claim language against a specific process or product.
Map a specific bath chemistry against the crowded claims
Run the exact additive, brightener or alloy system planned for production against the C25D core to see how close the nearest prior art actually sits before committing to a formulation.
Explore in Patsnap EurekaTrack the quiet incumbents
Zero recent-year filings from established assignees deserve a closer look at licensing activity, trade-secret shifts and litigation history before assuming the space is open.
Explore in Patsnap EurekaTest a claim in the identified white space
Draft a first claim around closed-loop thickness-uniformity feedback or pulse-reverse waveform control and check it against the thinner prior art in those branches.
Explore in Patsnap EurekaCommon questions about electroplating patents
Filing activity in this dataset is led by a mix of specialty-chemicals suppliers and large electronics and steel manufacturers, with the strongest co-assignee pairing sharing 97 families between an electronic-materials firm and its parent technology group. No single assignee dominates the full 17,402-family corpus outright; instead, filing concentrates among a handful of firms that have been active for a decade or more. Checking the full assignee ranking alongside recent-year momentum is the fastest way to see whether a given holder is still actively filing or is coasting on an older portfolio.
No — filings peaked at 437 in 2021 after starting at 409 in 2017, then eased to 385 by 2022, which is a flat-to-declining pattern rather than sustained growth. Because publication lags filing by roughly 18 months, the final one to two years of any chart will always look lower than they eventually turn out to be, so the true 2024-2026 volumes are likely higher than currently shown. Even accounting for that lag, the shape of the curve points to a mature field rather than one still in an expansion phase.
That Atotech Deutschland filing covers an acidic zinc or zinc-nickel alloy plating bath containing zinc ions, optional nickel ions, chloride ions and a dithiocarbamyl alkyl sulfonic acid or salt as a specific additive class, aimed at improving throwing power and thickness distribution on complex-shaped parts including rack-and-barrel plating. Anyone formulating a similar acidic zinc or zinc-nickel bath with a related sulfonic-acid-based additive should read the full claim set closely, since the composition and the resulting throwing-power improvement are both claimed. Formulations using a materially different additive chemistry or operating in an alkaline rather than acidic bath sit outside this particular claim scope.
The data shows filing density concentrated almost entirely in core C25D bath-composition and current-density claims, while crossover areas such as battery-electrode plating (H01M, 314 records), laminate interfaces (B32B, 389 records) and closed-loop thickness-uniformity sensing are comparatively thin. These smaller counts do not guarantee an easy path to allowance, but they indicate less-crowded claim territory worth a freedom-to-operate check before assuming the space is blocked. Pulse-reverse waveform control and additive-synergy claims combining multiple brighteners are two specific branches worth a closer look.
Multiple established filers, including large specialty-chemicals and electronics companies, show zero filings in the most recent year in this dataset, with one showing a reported -100% year-on-year change. This is consistent with several possible explanations: portfolio maturity in a saturated core claim area, a strategic shift toward trade-secret protection for bath additive formulations that are hard to reverse-engineer from a finished part, or simply the publication lag understating their true recent activity. It is worth checking litigation and licensing records for these firms before concluding they have exited the technology.
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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.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.