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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/copper-wire-bonding-reliability-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Patent Landscape · Copper ProcessingCopper wire bonding reliability patents: mapping the assignees and claim territory behind free-air-ball, intermetallic and pad-splash reliability
- 76.4% concentration. The top 5 of 34 ranked assignees account for 97 of the 127 records in scope — a field with a narrow set of controlling filers rather than a broad, fragmented one.
- Filing peaked in 2021. Activity reached 13 records that year and had fallen to 5 by 2024, a -62% move over that span; 2025-2026 figures are still filling in due to publication lag.
- H01L dominates, B23K trails. 70.9% of records sit in semiconductor-device classification H01L while only 18.9% touch B23K welding/soldering/brazing directly — most of the claim activity is device-side, not process-side.
127
Published Records
76%
Top-5 Share of All Records
-62%
Filing Growth 2021→2024
US
Leading Jurisdiction
Filing growth compares 2021 (13 records) with 2024 (5) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 127 records in scope (CR5), not by the ranked leaders only.
Published byPatsnap Research··7 min readSourced from Patsnap Eureka
Overview
What this landscape covers
Copper wire bonding reliability sits at the intersection of interconnect metallurgy and semiconductor packaging: free-air-ball formation, intermetallic growth at the copper-aluminium interface, pad splash geometry, and the narrow bond force window that keeps a copper ball bond from cracking a pad or leaving a corrosion path open. The 127 records in scope span 2015 through the 2026 cut-off and cluster around semiconductor device structures rather than the bonding process equipment itself.
The scope was built from search terms tying copper ball bonding and palladium-coated copper wire to specific failure and qualification mechanisms — free-air-ball formation, intermetallic growth, pad splash, bond force window, halogen contamination and high-temperature storage testing — so the corpus is weighted toward reliability engineering claims rather than general wire-bonding equipment.
Filing activity and technology composition, 2015-2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Copper Wire Bonding Reliability covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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The numbers
Filing trend and technology composition
Two views of the same 127 records: how filing activity has moved year over year, and which IPC subclasses carry the claim density.
Filing activity, 2017-2026
Filings rose to a peak of 13 in 2021, then declined to 5 by 2024 — a -62% move over that three-year span. Because publication typically lags filing by roughly 18 months, the 2025 and 2026 figures shown here are still incomplete and should not be read as a continued decline.
IPC subclass composition
H01L (semiconductor devices) appears on 70.9% of the 127 records, well ahead of H10W at 26.0% and B23K (welding, soldering & brazing) at 18.9%. Smaller subclasses — B22F powder metallurgy, H01B conductors, H05K assemblies, G01L force measurement, H10N solid-state devices — each sit at or under 5.5%, marking narrower, more specialised claim territory. Records can carry multiple classes, so these shares sum to more than 100% of the record total.
Shares are the percentage of the 127 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on Copper Wire Bonding Reliability covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
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Representative and most-cited records
Representative record
US20140054781A1 — Copper Ball Bond Features and Structure
NXP USA, INC.
An integrated circuit wire bond connection is provided having an aluminum bond pad that is directly bonded to a copper ball to form an aluminum splash structure and associated crevice opening at a peripheral bond edge of the copper ball, where the aluminum splash structure is characterized by a plurality of geometric properties indicative of a reliable copper ball bond, such as lateral splash size, splash shape, relative position of splash-ball crevice to the aluminum pad, crevice width, crevice length, crevice angle, and/or crevice-pad splash index.Filed by NXP USA, Inc., published 2014-02-27. The claims are built around measurable splash geometry rather than a specific alloy or process step, which is what makes them relevant to anyone qualifying a copper ball bond process today.
Most-cited records in scope
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20120001336A1 | Corrosion-resistant copper-to-aluminum bonds | 87 |
| 2 | US9508622B2 | Method for protecting copper wire bonds on aluminum pads of a semiconductor device from corrosion | 41 |
| 3 | US20160148965A1 | Detector assembly using vertical wire bonds and compression decals | 36 |
| 4 | WO2013076548A1 | Bonding wire and process for manufacturing a bonding wire | 30 |
| 5 | US20120273954A1 | Semiconductor device with protective material and method for encapsulating | 29 |
| 6 | US20120125977A1 | Ultrasonic transducers for wire bonding and methods of forming wire bonds using ultrasonic transducers | 27 |
| 7 | US20120074206A1 | Methods of forming wire bonds for wire loops and conductive bumps | 23 |
| 8 | US20150322586A1 | Bonding wire and process for manufacturing a bonding wire | 21 |
| 9 | US20150145148A1 | Copper Ball Bond Interface Structure and Formation | 18 |
| 10 | US20140374467A1 | Capillary bonding tool and method of forming wire bonds | 16 |
Citation counts are drawn from within this searched corpus and skew toward older filings; treat them as a signal of influence on later filers, not of current commercial weight.
Each row carries its publication number; clicking a row searches Eureka by that number.
Source: Patsnap Eureka. Citation counts and representative records. Derived from a Patsnap search on Copper Wire Bonding Reliability covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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What the data means for a filing decision
Three findings that shape where a new filing would sit relative to existing claims.
Concentration
76.4% of 127 records
top 5 of 34 ranked assignees
A small group holds the controlling claims
The top 5 ranked assignees account for 97 of the 127 records in scope, and the top 10 push that to 92.9%. A new entrant is filing into territory already staked by a handful of large device and packaging companies, not a fragmented field of small players.
Freedom-to-operate work should start with the leading assignees' claim scope, not a broad prior-art sweep.
Momentum
13 → 5
peak-year filings, 2021 to 2024
Activity has cooled from its 2021 peak
Filing volume dropped -62% from the 2021 peak of 13 to 5 in 2024, the last year that can be treated as complete. Several of the most active assignees show 0 filings in the latest tracked year, though publication lag means recent quiet periods can still fill in.
A slower current filing pace does not mean weaker enforcement — cited patents from the 2012-2016 window remain influential.
Composition
70.9% vs 18.9%
H01L records vs B23K records
Claims cluster on the device, not the process
Semiconductor-device classification H01L covers 70.9% of the 127 records, while B23K (welding, soldering and brazing) covers only 18.9%. Reliability claims are overwhelmingly written around the resulting device structure — pad geometry, splash shape, intermetallic layer — rather than the bonding equipment or process parameters themselves.
Process-side claims (bond force control, contamination handling) look comparatively less crowded than device-structure claims.
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Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to copper wire bonding reliability, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Copper Wire Bonding Reliability covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
Players
Who is filing, and where the gaps sit
The ranked leaders account for nearly all of the field's records, but the co-assignee pairings and thin subclasses point to where new claim space is still open.
Leader
44 records
leading assignee filing count
One filer sets the pace
The top-ranked assignee holds 44 of the 127 records in scope, well clear of the fifth-place assignee's 6 and the tenth-place assignee's 4. That gap is the clearest single signal in the ranking.
Any competitive read of this field has to start with that leader's claim scope specifically.
Long tail
34 ranked assignees
full assignee ranking
A long tail beyond the top 10
Past the top 10, which together hold 92.9% of records, the remaining 24 assignees in the ranking each hold small counts. This is a field with a dominant core and a thin periphery, not a broad competitive set.
New entrants are more likely to find open space in the periphery than to out-file the leaders directly.
Collaboration
10 pairs
co-assignee pairings identified
Filing partnerships are narrow but repeated
Ten co-assignee pairs appear in the data, with the strongest pairs each linked on 4 records — including corporate-subsidiary pairings and named-inventor/company pairs. These repeated pairings suggest stable internal R&D teams rather than shifting joint ventures.
Tracking named inventors alongside corporate assignees surfaces pairings a company-only view would miss.
Recent-year filing momentum
| Assignee | Recent year | YoY |
|---|---|---|
| Texas Instruments Inc. | 0 | -100% |
| Kulicke & Soffa Industries, Inc. | 0 | — |
| Lockheed Martin Corporation | 0 | — |
| Tanaka Denshi Kogyo K.K. | 0 | — |
| HIGGINS III LEO M | 0 | — |
| GILLOTTI GARY S | 0 | — |
| Freescale Semiconductor, Inc. | 0 | — |
| Texas Instruments Japan Ltd. | 0 | — |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Copper Wire Bonding Reliability covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
What's next
Next steps for an R&D or IP team
This landscape gives the shape of the field. Turning that into a filing or freedom-to-operate decision means going record by record against a specific claim set.
Check freedom-to-operate against the leading assignees
With 76.4% of records held by 5 of the 34 ranked assignees, an FTO review should map the leader's claim scope in detail before assessing the rest of the field.
Run an FTO check in EurekaTrace the citation chain from the most-cited records
The most-cited records in this corpus date to 2012-2016; understanding what they block, and what has been filed against them since, clarifies which claim language is already settled.
Explore citation trees in EurekaDraft around the under-claimed subclasses
B22F, H01B, H05K, G01L and H10N each sit under 6% of records — narrower ground than the H01L core, and a more realistic place to stake a defensible claim.
Draft claims with EurekaSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Copper Wire Bonding Reliability covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions on copper wire bonding reliability patents
Filing in this field is concentrated: the top 5 of 34 ranked assignees account for 97 of the 127 records in scope, or 76.4% of the total. The single leading assignee holds 44 records on its own, well ahead of the fifth-ranked assignee at 6. This means due diligence on this technology should start with the leading filer's specific claim scope rather than treating the field as evenly distributed among many competitors.
Pad splash is the deformation of the aluminium bond pad that occurs when a copper ball is thermosonically bonded to it, and its geometry — lateral splash size, shape, crevice width and angle — is used as a proxy for bond reliability. It appears repeatedly in claims, including the representative record in this dataset, because splash geometry is measurable after bonding and correlates with long-term reliability outcomes like corrosion resistance. Claims built around specific splash-geometry thresholds are a common way to stake reliability territory without claiming a particular alloy or process step.
Filing peaked in 2021 at 13 records in this dataset and had fallen to 5 by 2024, a -62% decline over that span, which is the most recent period that can be read as complete. Publication lags filing by roughly 18 months, so the lower counts shown for 2025 and 2026 in the raw trend line are an artefact of that lag, not necessarily a real drop-off. A fair read is that filing activity cooled from its 2021 peak but the true current pace is not yet visible in published data.
Relative to the H01L semiconductor-device core, which touches 70.9% of the 127 records, subclasses like B22F powder metallurgy, H01B conductors and insulators, H05K printed circuit assemblies, G01L force measurement and H10N solid-state devices each sit at or below 5.5% of records. That gap suggests narrower claim opportunities around wire alloy formulation, force-measurement methods for bond qualification, and assembly-level integration, areas where the dominant device-structure claims have not saturated the space.
US20140054781A1, assigned to NXP USA and published in 2014, claims a copper ball bond structure defined by measurable aluminium splash geometry — including splash size, shape, and crevice width, length and angle — as an indicator of bond reliability. It is one of the field's representative records because its claims are geometry-based rather than tied to a single alloy or process recipe, giving it broad relevance to anyone qualifying a copper ball bonding process on aluminium pads. Anyone designing a qualification method around splash-geometry metrics should review its specific claim boundaries directly rather than relying on the abstract alone.
Answers are grounded in the same dataset. Derived from a Patsnap search on Copper Wire Bonding Reliability covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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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.