Taiwanese authorities have intensified their investigation into allegations that a former senior executive at Taiwan Semiconductor Manufacturing Company (TSMC) leaked sensitive company information to Intel, his current employer. The probe escalated this week after prosecutors confirmed that investigators raided the former executive’s homes and seized electronic devices as part of a widening inquiry into potential violations of national security and intellectual property laws.
The executive, Wei-Jen Lo, spent more than two decades at TSMC before leaving the company earlier this year and later joining Intel. His move reignited concerns over the movement of top engineering talent between major chipmakers in an industry driven heavily by proprietary research and closely guarded manufacturing techniques.
TSMC Files Formal Complaint Over Alleged Misuse of Confidential Information
TSMC, the world’s largest contract chip manufacturer and a key supplier to global technology companies such as Nvidia, filed a lawsuit earlier this week in the Intellectual Property and Commercial Court in Taiwan. In its complaint, the company accused Lo—formerly a senior vice president—of potentially mishandling or transferring confidential information after his departure.
According to TSMC, there is a “high probability” that Lo may have used, disclosed, or transferred trade secrets or other confidential material to Intel. The company said this concern prompted it to pursue legal action to protect its advanced semiconductor technologies and competitive edge in a rapidly evolving industry.
Lo played a central role in TSMC’s development and large-scale manufacturing of several cutting-edge chip nodes, including the widely used 5-nanometre process, as well as the newer 3-nm and forthcoming 2-nm nodes. These technologies represent some of the most sophisticated chip manufacturing processes in the world, and they are integral to TSMC’s position at the top of the global semiconductor supply chain.
While TSMC has not publicly detailed the specific trade secrets it believes may be at risk, the company’s decision to pursue legal action underscores the seriousness with which it views the matter. The technologies in question are regarded as highly strategic assets for both Taiwan and its global tech partners.
Prosecutors Treat Case as Possible National Security Issue
Taiwanese prosecutors confirmed that Lo is being investigated under the country’s National Security Act, a law typically applied in cases involving highly sensitive technology or threats to national interests. This classification signals that the government views the potential improper handling of semiconductor information as a matter of national importance rather than simply a corporate dispute.
Investigators executed search warrants on Wednesday, raiding two of Lo’s residences. Prosecutors said they confiscated several computers, USB drives, and other electronic devices believed to contain relevant data. The materials, now in the hands of forensic analysts, will be reviewed to determine whether any classified or proprietary information was improperly transferred.
A court has also approved the temporary seizure of Lo’s assets, including real estate holdings and shares, to prevent any potential disposal of assets during the investigation. Such measures are typically applied in cases where authorities believe financial penalties or further legal action may follow.
Intel Rejects Allegations, Defends Its Employee
Intel, which rehired Lo in October following his retirement from TSMC, strongly rejected all accusations made against him. In an emailed statement, the company said: “Based on everything we know, we have no reason to believe there is any merit to the allegations involving Mr Lo.”
The company emphasized its internal compliance standards, saying it maintains “rigorous policies and controls” that prohibit the use or transfer of trade secrets or confidential information belonging to third parties. Intel stressed that it takes these commitments seriously and said Lo is highly respected across the semiconductor industry for his leadership and technical abilities.
The company also noted that movement of skilled engineers and executives between major chipmakers is common, describing the situation as typical within a competitive industry where innovation is often driven by talent. Intel added that it had welcomed Lo back to the company and expressed confidence in his professionalism.
A Long Career Spanning Two Chipmaking Giants
Lo’s long career history adds significant weight to the investigation. Before joining TSMC in 2004, he spent 18 years at Intel, making his return to the U.S. chipmaker in 2024 a reunion after two decades apart. During his 21-year tenure at TSMC, he became one of the key architects behind the company’s most advanced chip manufacturing breakthroughs.
His move back to Intel came shortly after he retired from TSMC, a timeline that has drawn scrutiny given the intense competition between the two companies, especially as Intel attempts to regain ground in advanced chip manufacturing.
Broader Tensions in the Global Semiconductor Landscape
The case comes at a time when the semiconductor industry is central to geopolitical and economic discussions worldwide. Taiwan’s chip sector, led by TSMC, plays a critical role in global supply chains, making any potential leak of advanced technologies a matter of strategic concern.
Both Taiwan and the United States have implemented strict controls on how semiconductor technologies are shared, especially those involving leading-edge manufacturing nodes. Allegations involving companies as prominent as TSMC and Intel therefore carry far-reaching implications.
Legal experts say the case could influence hiring practices and strengthen corporate safeguards across the semiconductor industry, particularly where senior engineers and executives handle sensitive proprietary information.
