Taiwanese prosecutors detain three over alleged TSMC chip secret theft

Taiwanese prosecutors have detained three individuals — two current TSMC employees and one former staff member surnamed Chen — over allegations of stealing trade secrets from Taiwan Semiconductor Manufacturing Co (TSMC), the world’s largest chip foundry. The detentions took place late last month following a TSMC internal investigation that uncovered unauthorized access to company information.

Two additional suspects were released on bail, while another was released without bail. Authorities suspect the detained individuals of violating Taiwan’s national security law, though no detailed identities have been disclosed.

TSMC stated it initiated legal action and disciplinary measures against those involved after routine monitoring detected suspicious activity. The company’s early detection system prompted swift internal inquiries, leading to the identification of personnel linked to the breach. The matter is now under judicial review, preventing further public disclosure from TSMC.

According to Nikkei Asia, the case involves attempts by several former employees to obtain highly sensitive information related to TSMC’s 2-nanometer chip technology — considered the industry’s most advanced in density and energy efficiency. Investigations have not yet determined whether the stolen information was transferred to external parties or the full scope of the leak.

Taiwanese media outlet United Daily News reported that prosecutors also searched offices of Japanese chip equipment supplier Tokyo Electron, though both the company and prosecutors declined comment.

TSMC, a critical supplier to Nvidia, Apple, and Qualcomm, reiterated its zero-tolerance policy on trade secret violations, vowing to prosecute offenders to the fullest extent of the law.