Silicon Carbide Power Device Gate Driver Patent Landscape
Silicon Carbide Power Device Gate Driver Patent Landscape in 2026
The SiC gate driver patent space is a small, China-dominated corpus with activity concentrated among a handful of applicants — Shanghai Hestia Power leads with the largest single share of patent families. The field peaked in 2020 and annual volume has eased since, though publication lag means the most recent filings remain under-counted.
Shanghai Hestia Power leads a tightly held, China-centric field
Shanghai Hestia Power Inc holds the top position in the ranking with 4 patent families, well ahead of the nearest challenger, Shen Zhen Huaqiang Electric Technology Co Ltd at 2 patent families. The remaining ranked applicants each hold a single patent family.
The top five filers account for 47% of the hundred largest filers’ combined total, indicating a moderately concentrated field where one leader holds a clear distance over a broadly fragmented second tier. There is no compact group of strong challengers immediately behind the leader.
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 1 | Shanghai Hestia Power Inc | 4 | |
| 2 | Shen Zhen Huaqiang Electric Technology Co Ltd | 2 | |
| 3 | GD Midea Air Conditioning Equip Co Ltd | 1 | |
| 4 | Groene Technology (Shanghai) Semiconductor Co Ltd | 1 | |
| 5 | China Electric Power Research Institute Co Ltd | 1 | |
| 6 | Xi’an Kepai Electric Co Ltd | 1 | |
| 7 | Midea Group Co Ltd | 1 | |
| 8 | State Grid Corporation of China | 1 |
| # | Applicant | Patent families | Share |
|---|---|---|---|
| 9 | SHENZHEN V&T TECH | 1 | |
| 10 | Hisense Home Appliances Group Co Ltd | 1 | |
| 11 | Electric Power Research Institute of State Grid Shanxi Electric Power Co Ltd | 1 | |
| 12 | Gree Electric Appliance Inc of Zhuhai | 1 | |
| 13 | Institute of Electrical Engineering, Chinese Academy of Sciences | 1 | |
| 14 | Meraki Integrated Circuit (Shenzhen) Technology Ltd | 1 | |
| 15 | Jiangsu Xinyang Electronics Technology Co Ltd | 1 |
The leader’s position in power conversion and pulse-technique circuits suggests that gate driver innovation in this corpus is being driven by power-electronics specialists and appliance makers rather than pure semiconductor device houses. This leaves device-level differentiation comparatively open.
Filings from the most recent 18–24 months are subject to publication lag and likely understate current activity; trend observations for 2024–2026 should be treated as provisional. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
A 2020 peak in filings and a power-conversion-heavy technology mix
The filing trend chart captures the annual rhythm of activity from 2019 onward, while the technology composition chart shows which IPC branches dominate and which remain sparse.
Annual filing trend
Activity spiked sharply in 2020 with 6 patent families filed, then retreated. The multi-year window still shows positive net activity, but annual volume has eased from that 2020 peak. Figures for 2024–2026 should be read as provisional due to publication lag.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H02M (power conversion) is the dominant branch, followed by H03K (pulse technique and logic circuits) and H02P (motor and generator control). Semiconductor-device branches H01L and H10D are present but secondary, and protective-circuit branch H02H and switches-and-relays branch H01H are notably sparse.
↗ 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.
Silicon carbide power device, driving circuit and …
A silicon carbide power device controlled by a driver and comprises a gate-to-source voltage and a source voltage, wherein the source voltage decreases according to an increase of the gate-to-source voltage, or the source voltage increases according to a decrease of the gate-to-source voltage. Thus, a spike caused by a change of the gate-to-source voltage… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | 一种基于分立式碳化硅功率器件的电机控制器 | 21 |
| 2 | 功率器件及电器 | 6 |
| 3 | 一种分立式碳化硅功率器件的并联驱动电路 | 3 |
| 4 | Silicon carbide power device, driving circuit and … | 3 |
| 5 | 一种基于分立式碳化硅功率器件的电机控制器 | 3 |
| 6 | Silicon carbide power device, driving circuit and … | 3 |
| 7 | 驱动电路、电机驱动芯片、电机控制装置和电动设备 | 1 |
| 8 | 一种碳化硅功率器件的保护电路及驱动电路 | 1 |
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 structure means for R&D investment decisions
The corpus is small but structured enough to reveal clear life-cycle signals, concentration dynamics, an emerging collaboration pattern, and a strongly. China-first jurisdiction profile.
Post-peak, with annual volume easing from the 2020 high
The lifecycle evidence places this field in a decline stage: annual filings have eased back from the 2020 peak, and the recent-window growth rate is negative at –29%. This does not necessarily signal obsolescence — publication lag partially suppresses the most recent cohorts — but it does suggest that the initial wave of foundational gate-driver patents has largely been filed and competitive advantage now shifts toward implementation and integration.
Lifecycle: DeclineOne clear leader, a broad fragmented second tier
Shanghai Hestia Power Inc stands apart from all other ranked applicants by family count. Below it, more than a dozen organizations each hold a single patent family, creating a flat second tier with no immediate challenger cluster. For a new entrant, this flat tier represents both low barrier to ranking entry and limited signal about which second-tier player could consolidate.
HHI: ModerateOne documented co-filing pair: Midea Group and GD Midea Air Conditioning
The only co-applicant relationship in evidence is between Midea Group Co Ltd and its subsidiary GD Midea Air Conditioning Equip Co Ltd, with one jointly filed patent family. This intra-group collaboration reflects vertical integration within a large appliance conglomerate rather than cross-industry alliance activity. External partnerships between gate-driver specialists and device makers are not yet visible in this corpus.
Collaboration: LimitedChina accounts for the overwhelming share of filing activity
China is the dominant jurisdiction with 14 patent records, while the United States accounts for 3 records. No other jurisdictions appear in evidence. This strong China weighting reflects both the home-office filing patterns of the ranked applicants and the broader shift of SiC power electronics manufacturing toward Chinese industry. Non-China IP coverage is thin, which creates both freedom-to-operate considerations and potential entry points for applicants seeking US or European protection.
Jurisdiction: CN-dominantGo 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 |
|---|---|---|
| Midea Group Co Ltd | GD Midea Air Conditioning Equip Co Ltd | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Shanghai Hestia Power leads; appliance and grid players fill the second tier
The top two ranked applicants come from the power-electronics and industrial-electronics segment, while the broader second tier spans appliance makers, grid operators, and academic institutions.
Shanghai Hestia Power Inc
Shanghai Hestia Power Inc holds 4 patent families, the largest block in this corpus. Its associated entity Shanghai Hestia Power focuses on pulse-technique and logic-circuit work (H03K17) alongside semiconductor-device classes H01L29 and H10D62, indicating a gate-driver-circuit-first approach grounded in device-level understanding. No momentum trend data is available for this applicant in the evidence.
families: 4Shen Zhen Huaqiang Electric Technology Co Ltd
Shen Zhen Huaqiang Electric Technology Co Ltd holds 2 patent families, placing it second in the ranking but at half the leader’s volume. Detailed technology focus and momentum data for this applicant are not available in the current evidence. Its position in the Shenzhen electronics cluster suggests proximity to both SiC device supply chains and downstream power-conversion applications.
families: 2| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Gree Electric Appliance Inc of Zhuhai | 1 | ▲ new entrant |
| Hisense Home Appliances Group Co Ltd | 1 | ▲ new entrant |
| Groene Technology (Shanghai) Semiconductor Co Ltd | 1 | ▲ new entrant |
Under-served branches adjacent to the dominant gate-driver corpus
Four IPC branches appear at the periphery of the corpus with low patent-record counts. Two stand out as having plausible technical relevance to SiC gate-driver design and realistic paths for new filings.
H02H · Protective circuit arrangements
With only 2 patent records and a 5% share among the represented branches, protective-circuit IP for SiC gate drivers is sparse relative to the dominant power-conversion work. SiC devices are susceptible to short-circuit and over-voltage failures that demand gate-level protection tailored to fast switching transients — a technically distinct problem from general protection circuits. The low count suggests that integrated protection schemes (desaturation detection, active clamping, soft shutdown) have not yet attracted concentrated filing, making this a plausible entry point for applicants with gate-driver hardware expertise.
Search this in Eureka →H01H · Switches & relays
H01H appears with only 1 patent record and a 3% share, placing it at the very edge of this corpus. Gate-driver interfaces to bypass relays and solid-state switching configurations are increasingly relevant in modular SiC power stacks, but this adjacency is currently almost entirely absent from the filing record. This is an observation of relative sparsity rather than a confirmed gap; engineers considering protection or redundancy architectures at the system level may find limited prior art here.
Search this in Eureka →How leading applicants differ by technology route
Strength of each leader across the main technology routes.
| Player | H02M 1 · Power conversion (AC/DC etc.) | H03K 17 · Pulse technique & logic circuits | H02M 7 · Power conversion (AC/DC etc.) | H01L 29 · Semiconductor devices | H05K 7 · Printed circuits & assemblies |
|---|---|---|---|---|---|
| South China University of Technology | Strong · 2 | Absent | Strong · 2 | Strong · 2 | Strong · 2 |
| Shanghai Hestia Power Inc | Moderate · 1 | Strong · 3 | Absent | Strong · 2 | Absent |
| China Electric Power Research Institute Co Ltd | Strong · 1 | Absent | Absent | Absent | Strong · 1 |
| Institute of Electrical Engineering, Chinese Academy of Sciences | Strong · 1 | Strong · 1 | Absent | Absent | Absent |
| State Grid Corporation of China | Strong · 1 | Absent | Absent | Absent | Strong · 1 |
| Electric Power Research Institute of State Grid Shanxi Electric Power Co Ltd | Strong · 1 | Absent | Absent | Absent | Strong · 1 |
Frequently asked questions
The corpus contains 17 patent families in scope. This is a small corpus, and all trend and share figures should be interpreted with that scale in mind.
Shanghai Hestia Power Inc leads with 4 patent families, more than double the next-ranked applicant, Shen Zhen Huaqiang Electric Technology Co Ltd, which holds 2 patent families.
China is the dominant jurisdiction with 14 patent records. The United States accounts for 3 patent records. No other jurisdictions appear in the current evidence.
H02M (power conversion, including AC/DC converters) is the most represented IPC branch. H03K (pulse technique and logic circuits) and H02P (control of motors and generators) also have significant representation, reflecting the gate-driver’s role in switching and motor-drive applications.
Annual filing volume peaked in 2020 and has eased since, with a recent-window growth rate of -29%. The lifecycle evidence characterizes the field as in a decline phase. However, figures for the most recent 18–24 months are subject to publication lag and may understate current activity.
Only one co-applicant relationship is documented: a joint filing between Midea Group Co Ltd and its subsidiary GD Midea Air Conditioning Equip Co Ltd. Cross-organization or cross-industry collaboration is not visible in the current evidence.
Ready to map your own SiC gate driver patent landscape?
Join 18,000+ innovators using PatSnap Eureka to map any technology landscape: search 2B+ patents and papers, surface key assignees, and generate a report like this in minutes.
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.