# Power Semiconductors (SiC and GaN) Topic radar · 3,927 documents · 2021-01-01–2026-09-22 · updated 2026-09-22 Canonical: https://slate.greyb.com/radar/power-semiconductors-sic-and-gan/innovations ## In one minute ### The 1200V regulatory boundary is forcing a regional bifurcation of AI power architectures A sharp divergence in trade policy for high-voltage power semiconductors is creating mutually exclusive technical ecosystems. In mid-2026, the U.S. Bureau of Industry and Security (BIS) added 1200V SiC MOSFETs to the Commerce Control List [1], while Japan’s METI simultaneously added the same modules to the RCEP "fast-track" list to accelerate intra-Asian trade [2]. This regulatory split suggests that R&D teams must now maintain redundant design architectures: one optimized for Western EAR compliance and another for RCEP-facilitated trade zones, as a module cleared for fast-track Asian deployment may become legally unviable for Western critical infrastructure. **Why this is worth reading** This identifies a transition from global technical standards to geopolitically dictated ones. 1. [globaltradedraft.com](https://globaltradedraft.com/news/Power_Semis/SiC_MOSFETs_1200V_/US_Adds_License_Rule_for_SiC_GaN_Power_Modules.html) 2. [globaltradedraft.com](https://globaltradedraft.com/news/Power_Semis/SiC_MOSFETs_1200V_/METI_Adds_1200V_SiC_Modules_to_RCEP_Fast_Track_List.html) ### AI infrastructure is driving a "road-to-rack" transition toward 800V direct-to-chip delivery Navitas has advanced GaN and SiC technologies specifically for NVIDIA's 800V DC AI factory architecture to bypass the thermal limits of legacy silicon. This shift is reflected in market projections, where GaN-on-Si applications alone are expected to reach $9.75 billion by 2034 as AI rack densities increase. ### Vertical architecture and epitaxial engineering are replacing raw substrate quality as the primary technical moat Evidence across the landscape indicates a fundamental shift in where competitive value is captured: 84.1% of the total 3,302 documents are concentrated in Device Architecture, while the underlying Wide Bandgap Material Science area represents only 10% of activity. This concentration suggests that the industry has moved past basic material validation and is now focused on the high-complexity engineering of vertical HEMTs and trench-gate MOSFETs to manage extreme electric fields. The portfolio reveals that proprietary epitaxial stack recipes—specifically graded AlGaN barrier layers and p-type ion implantation—are being used to suppress leakage where traditional lateral designs fail. ### Litigation is replacing licensing as the primary market exclusion tool A shift from royalty-seeking to total market exclusion is visible in the recent escalation of patent infringement lawsuits. Wolfspeed initiated litigation against Navitas in July 2026 regarding SiC and GaN technologies, while Infineon secured an ITC exclusion order against Innoscience. These actions, occurring despite existing equity stakes or past collaborations, indicate that territorial control over core architectures now outweighs the benefits of cross-licensing, likely triggering a wave of portfolio consolidation to secure sovereign manufacturing lines. ### Patent litigation is shifting from royalty-seeking to total market exclusion Intellectual property in the SiC and GaN sector has moved from the laboratory to the courtroom, functioning as a primary mechanism for territorial market exclusion. This is exemplified by the reciprocal escalation of product bans, such as the ITC exclusion orders and Chinese Supreme Court injunctions involving Infineon and Innoscience. Furthermore, Wolfspeed has initiated litigation against Navitas despite holding a significant equity stake, suggesting that territorial control over core architectures now outweighs the benefits of equity-based collaboration. ### Geopolitical provenance is bifurcating the global supply chain into regional "trusted foundry" ecosystems A clear disagreement has emerged between technical momentum and regulatory stability. While technical reports project the GaN-on-Si market to reach $9.75 billion by 2034, regulatory filings show increasing fragmentation. In mid-2026, the U.S. Bureau of Industry and Security (BIS) added 1200V SiC MOSFETs to the Commerce Control List, while Japan's METI simultaneously added the same modules to the RCEP "Fast Track" list for easier regional trade. ### AI data center density is driving a "road-to-rack" hardware convergence Navitas recently advanced GaN and SiC technologies specifically for NVIDIA’s 800V DC "AI Factory" architecture, while onsemi introduced an embedded power platform for the AI era in late 2026. This convergence suggests that legacy power supply manufacturers who lack internal WBG fabrication will be marginalized as power conversion becomes an inseparable part of the server-rack silicon stack. ### The value capture is migrating from discrete components to integrated "grid-to-chip" thermal modules Market evidence indicates that the primary bottleneck for AI and EV infrastructure is no longer the semiconductor die itself, but the thermal packaging required for extreme power densities. Integrated power modules (IPMs) are projected to reach a $6.25 billion valuation by 2035. This is supported by product launches like onsemi's "embedded power platform" for the AI era and Navitas's acquisition of Claros to secure Vertical Power Delivery (VPD) technology. ## Overview The focus of power semiconductor R&D has shifted from material feasibility to a high-complexity architectural phase where the primary technical moat is proprietary epitaxial stack engineering rather than raw substrate quality. This "silent fortification" is characterized by a massive volume of fundamental inventions in vertical architectures that have yet to appear in trade-press or product marketing, suggesting a deep R&D positioning ahead of a major platform transition. Technical defensibility is migrating from the wafer to the proprietary epitaxial growth recipe. The portfolio reveals that 84% of the radar’s 3,927 documents are concentrated in Device Architecture, specifically vertical HEMTs and trench-gate MOSFETs designed to manage extreme electric fields. This shift suggests that competitive advantage will no longer reside in sourcing high-quality SiC or GaN wafers, but in the ability to execute complex, multi-layered doping profiles that decouple performance from substrate defects. The U.S. R&D leaders should anticipate a "weapons generation gap" where high-performance SiC superjunction MOSFETs are restricted to specific geopolitical zones, requiring redundant design architectures for global products. The industry is entering a phase of "silent fortification" where technical activity far outpaces market visibility. There is a stark disconnect between invention volume and public reporting; for the 1,175 inventions specific to SiC trench architectures, there is zero trade-press presence. The record indicates that while specialized firms like Navitas are leading technical architecture, larger players like Infineon and Renesas are consolidating the market through acquisitions to prioritize these proprietary vertical stacks over third-party components. Value capture is shifting from discrete components to integrated thermal-packaging interfaces. As SiC and GaN components become standardized, the record shows a move toward "mixed stacks" and integrated power modules (IPMs) that combine wide-bandgap materials with control logic to handle extreme power densities in AI data centers. For platform architects, this implies that the primary competitive moat is moving toward proprietary packaging interfaces that prevent third-party consumables from easily interfacing with the power stage. ## Areas - Device Architecture & Transistor Design · 3,302 documents - Wide Bandgap Material Science · 379 documents - AI Data Center & Grid Infrastructure · 77 documents - EV & Industrial System Integration · 35 documents - Market Intelligence & IP Protection · 105 documents