TSMC trade secrets allegedly copied by former engineer after move to Tokyo Electron
Prosecutors say a former TSMC engineer and colleagues copied confidential files on 2‑nm and A14 chip processes, prompting criminal and corporate scrutiny.
A criminal case unsealed by prosecutors alleges that a former engineer at Taiwan Semiconductor Manufacturing Company (TSMC) conspired with current employees to copy proprietary materials, prosecutors said. The defendant later joined Tokyo Electron, and authorities contend the group repeatedly accessed and duplicated secret documents beginning in mid‑2023. The files reportedly included processing data tied to advanced 2‑nanometer production and a so‑called A14 technology described as the next generation of chip manufacturing.
Prosecutors outline alleged conspiracy and charges
According to the indictment, the main suspect used prior access at TSMC to obtain confidential engineering documents. Prosecutors allege that the defendant coordinated with former and current colleagues still employed at TSMC to transfer material outside secure company systems. The charges center on theft and unlawful retention of trade secrets, with prosecutors arguing the activity was willful and organized.
The filing asserts repeated episodes of copying and data exfiltration beginning in mid‑2023 and continuing thereafter. Investigators say the pattern involved both digital transfers and physical copying of sensitive process notes and specifications. Authorities have not publicly released the identity of the accused beyond describing their former and subsequent employers.
Alleged targets: 2‑nm processing and ‘A14’ technology
Prosecutors identified the most sensitive material as documentation related to 2‑nanometer node processing, a technology at the forefront of cutting‑edge semiconductor fabrication. The indictment also cites files associated with an internally labelled "A14" technology, which prosecutors say represents next‑generation process recipes and equipment parameters. Both sets of materials are described as commercially valuable and closely guarded within TSMC.
Those technologies are widely regarded within the industry as critical to sustaining performance and efficiency gains in advanced chips. Control of process knowledge for nodes at or below 2‑nm confers competitive advantage to foundries and their customers. Prosecutors contend that unauthorized access to those process details could meaningfully erode TSMC’s technological lead.
Tokyo Electron and TSMC face legal and reputational questions
The indictment notes the defendant moved to Tokyo Electron after leaving TSMC, a career trajectory that drew particular attention from investigators. Prosecutors say the transition raised concerns about potential transfer of know‑how to a competitor or client that supplies semiconductor manufacturing equipment. Both companies have standing to pursue civil remedies, and the criminal case adds a parallel legal dimension.
Representatives for TSMC and Tokyo Electron have not been named in the charging documents, and public statements on the indictment have been limited. Corporate responses typically emphasize compliance with export controls, intellectual property protections, and cooperation with law enforcement when allegations arise. The case is likely to spur internal reviews at technology suppliers and foundries regarding employee access controls and post‑employment data handling.
Evidence, investigative steps, and legal process ahead
Prosecutors indicate they will present logs, device forensics, and witness testimony to establish the pattern of copying and transfer. The evidence reportedly includes timestamps, file hashes, and communications that prosecutors say link the accused to the duplicated materials. Defense teams in similar matters typically challenge chain‑of‑custody, access permissions, and the provenance of disputed files.
The legal process may involve pretrial motions, potential civil claims by affected companies, and requests for seizure or preservation of equipment. Depending on the jurisdiction and specific statutes invoked, penalties for trade secret theft can include significant fines and imprisonment. The case may also involve cross‑border cooperation if data or personnel movements extended beyond national boundaries.
Industry implications for chipmakers and equipment suppliers
If proven, the allegations underscore persistent tensions between talent mobility and protection of proprietary process know‑how in the semiconductor industry. Foundries like TSMC invest heavily in process development, and equipment suppliers play a central role in translating recipes into production. Unauthorized transfer of manufacturing knowledge can accelerate competitors and complicate customer relationships.
The complaint is likely to prompt other firms to tighten access controls, increase monitoring of privileged employees, and reinforce post‑departure safeguards. Corporate counsel and compliance teams will also reassess data governance and non‑disclosure frameworks to reduce the risk of similar incidents. Regulators and customers may demand greater transparency around how critical process information is stored and shared.
Investigations into alleged exfiltration of TSMC trade secrets are also likely to attract scrutiny from governments that view advanced semiconductor capabilities as strategic assets. National security considerations often intersect with commercial intellectual property disputes in this sector, adding an extra layer of regulatory interest.
The case will proceed through the courts, and the coming months are expected to clarify the scope of the alleged conduct, the strength of the evidence, and any corporate or criminal penalties that may follow.
