SHJ Cell Interconnection Patent Snapshot 2026
The patent corpus for SHJ cell interconnection is extremely small, with only 2 patent families in scope filed across two jurisdictions by two distinct applicants. Activity peaked in 2017 and has been absent in subsequent years, signalling that this specific framing of the technology either remains largely unpublished or has not yet attracted broad commercial filing attention.
Two applicants share the entire identified corpus equally
Tongwei Solar Energy (Chengdu) Co., Ltd. and the Arizona Board of Regents (on behalf of the University of Arizona) each hold one patent family, together accounting for the entirety of the top hundred filers’ combined total in this narrow search.
Concentration is absolute at this corpus size: the top five filers hold one hundred percent of the top hundred filers’ combined total, reflecting the nascent or narrowly scoped nature of this specific query rather than typical market dominance.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Tongwei Solar Energy (Chengdu) Co., Ltd. | 1 | |
| 2 | Arizona Board of Regents (University of Arizona) | 1 |
The equal split between a Chinese solar manufacturer and a US university suggests that commercial development and academic invention have so far proceeded on parallel, non-overlapping tracks with no observable overlap or co-filing.
This report covers identifiable patent families matching the SHJ cell interconnection query; filings from the most recent 18–24 months may not yet have published and are likely under-represented. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Sparse, intermittent filing with a single dominant technology class
The annual trend and technology composition charts together reveal a field that has seen only isolated filings over a decade, entirely within the semiconductor devices class.
Annual filing trend
One filing was recorded in 2017 and one in 2020; all other years from 2018 onward show zero activity. The absence of recent filings should be interpreted cautiously given publication lag, but the multi-year gap preceding 2024 is notable. The lifecycle evidence indicates annual volume has eased from its 2017 peak.
↗ Hover for values · click a bar to ask EurekaTechnology composition
Both patent families fall entirely within H01L — Semiconductor Devices, confirming that SHJ cell interconnection IP, as currently indexed, sits exclusively in the core photovoltaic device class with no adjacent branch diversification observed.
↗ 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.
Transparent conductive oxide in silicon heterojunc…
Devices and methods for reducing optical losses in transparent conductive oxides (TCOs) used in silicon heterojunction (SHJ) solar cells while enhancing series resistance are disclosed herein. In particular, the methods include reducing the thickness of TCO layers by about 200% to 300% and depositing hydrogenated dielectric layers on top to form double… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | 一种无主栅硅异质结SHJ太阳能电池及其制备方法 | 7 |
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.
Assignee snapshot from the current evidence set
The applicants below are visible in this query result. Because the evidence set is relatively small, read this section as a directional snapshot rather than a full competitive ranking.
Tongwei Solar Energy (Chengdu)
Tongwei Solar Energy (Chengdu) Co., Ltd. holds 1 patent family focused on H01L 31 semiconductor devices. As a commercial solar manufacturer, its filing in this area reflects product-level IP rather than foundational research. Applicant momentum data is not available for this corpus.
families: 1Arizona Board of Regents (University of Arizona)
The Arizona Board of Regents, associated with inventor Stanislau Herasimenka, holds 1 patent family also classified under H01L 31 semiconductor devices, represented by US10396219B2. This academic origin suggests foundational or process-level innovation. Applicant momentum data is not available for this corpus.
families: 1Frequently asked questions
The current search returns 2 patent families in scope, held by two distinct applicants — Tongwei Solar Energy (Chengdu) Co., Ltd. and the Arizona Board of Regents on behalf of the University of Arizona.
Tongwei Solar Energy (Chengdu) Co., Ltd. and the Arizona Board of Regents each hold 1 patent family, making them co-equal leaders in this narrowly scoped corpus.
China and the United States are the only jurisdictions represented, with one patent record in each. No European, Japanese, Korean, or PCT filings appear in the identified corpus.
All 2 patent families are classified under H01L — Semiconductor Devices. No adjacent IPC classes appear in the current corpus.
The evidence identifies a patent titled ‘A busbar-free silicon heterojunction SHJ solar cell and its preparation method’ as the most-cited work in this area, with 7 citations recorded.
Based on the lifecycle evidence, the field is classified as Decline, with annual filings having eased from a 2017 peak. Only 2 filings have been recorded across the entire observed period. Researchers should consider whether the narrow query framing may be excluding relevant filings captured under broader claim language.
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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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