Taiwan's flagship chipmaker is facing a fresh legal challenge in the United States, as two Ireland-registered patent licensing firms have filed infringement complaints against TSMC with a key American trade body — a case analysts say could carry significant consequences for chip exports if it goes against the company.
What the Complaints Allege
Longitude Licensing and Marlin Semiconductor have brought their case before the U.S. International Trade Commission (ITC), arguing that TSMC's 7-nanometer and more advanced process nodes violate patents they hold. The targeted products are chips built on non-x86 architectures manufactured using those processes. Should the ITC ultimately rule in the complainants' favor, the most severe potential remedy would be an import ban on the affected chip products entering the United States.
Who Is Behind the Lawsuit
Industry analysts note the case involves more than a straightforward intellectual property dispute. Both Irish firms are affiliated with patent management entities controlled by a San Francisco-based private equity firm, and are widely considered in the industry to be non-practicing entities (NPEs) — organizations whose primary business model is generating licensing revenue from patents rather than manufacturing any products themselves. Analysts add that the case also touches on broader patent transfer dynamics and the competing interests of major technology companies.
Taipei Responds
Taiwan's Ministry of Economic Affairs moved quickly to signal government backing for the sector. In a statement on June 11, the ministry said domestic semiconductor firms have a long-standing commitment to intellectual property rights and operate in full compliance with local laws across all major global locations, maintaining close collaboration with international customers and supply chain partners throughout.
The ministry added that the government will continue to monitor the situation and keep open lines of communication with relevant companies. It said assistance will be provided as needed to protect the stable international operation of Taiwan's semiconductor industry and to safeguard supply chain resilience.
TSMC, for its part, said the company complies with all applicable laws and regulations in every jurisdiction where it operates.
Why It Matters
The ITC is a powerful forum for patent disputes involving imported goods, and an adverse ruling — while not guaranteed — could disrupt the flow of advanced chips to the U.S. market at a time when semiconductor supply chains remain a focal point of geopolitical and trade tensions. The involvement of NPE-linked entities has drawn scrutiny, with critics arguing such litigation is designed to extract licensing settlements rather than address genuine manufacturing disputes.
