The US International Trade Commission has opened a patent investigation against 20 companies over power systems used in AI servers, acting on a complaint from power-chip maker Vicor. The respondents include Foxconn, Luxshare and Quanta, alongside Delta Electronics, Monolithic Power Systems, Infineon, Flex and Celestica. Vicor alleges infringement of one patent and seeks to block the products from entering the US. For buyers of AI infrastructure, the case puts a core part of server supply under legal review.
Vicor complaint targets vertical power delivery
The Commission said on Friday that it acted after Vicor filed its complaint, and the probe covers systems that deliver power to high-end chips from directly below them, plus the computers using them. Vicor asks for an exclusion order barring the accused products from the US and cease-and-desist orders stopping their sale. The respondent list spans contract manufacturers, power component suppliers and server assemblers. The Commission has not ruled on the merits of the claims, so the case remains at the investigation stage.
The technology at issue concerns how electricity reaches top-end processors inside AI servers, with current fed from beneath the chip rather than from the side. That layout shortens the power path and supports the dense, high-current designs used for accelerators. Vicor frames one of its patents as covering this approach. The complaint therefore links a single power-chip patent to finished server systems. Any remedy would apply to both the power modules and the computers that incorporate them.
The timing reflects pressure on AI server production, where power delivery, cooling and component density limit performance and shipment volumes. Contract manufacturers such as Foxconn, Quanta, Flex and Celestica build systems for cloud and enterprise customers, while Delta Electronics, Monolithic Power Systems and Infineon supply power stages and related parts. Luxshare, known as an Apple supplier, listed in Hong Kong in July in the city’s biggest IPO this year, according to the source. A dispute over a shared subsystem can thus touch several tiers of the supply chain at once.
What server buyers should track in the case
For companies buying AI capacity, the direct effect is uncertainty around availability and vendor choice rather than an immediate shortage. An import ban could only take effect after a full hearing and a final ruling, and the Commission will set a target completion date within 45 days. Large buyers with multi-vendor server qualifications have more room to shift orders if specific configurations are affected. Smaller firms tied to one integrator or one system design face longer requalification if supply changes.
The limits of the news are clear: no infringement finding has been made, and no products have been barred. Luxshare said in a Saturday filing that it does not expect a material impact on production, operations or results, as reported by Bloomberg. It added that the products at issue are still undergoing customer testing and are not in mass production. Buyers should therefore ask vendors which SKUs are named, whether alternative power designs exist, and how orders would be fulfilled during litigation.
The marker to watch is the Commission’s target date for completion, due within 45 days, followed by the schedule for hearing and ruling. If the case advances toward exclusion or cease-and-desist orders, server vendors will need to disclose design changes or licensing steps. If it narrows or ends without remedy, procurement plans can stay unchanged. The next filings on scope and schedule will show which outcome is taking shape.
