Taiwanese substrate supplier Unimicron is under investigation after judicial authorities launched a sudden search of company facilities. Investigators questioned 10 employees and seized hardware over allegations of deceptive country of origin labels on export parts. Local prosecutors have confirmed the operation while formal findings remain under review.
According to reports from China Times, the Taoyuan District Prosecutors Office confirmed that investigators searched Unimicron offices and questioned key personnel. The group brought in for questioning included 2 vice presidents and 1 accountant. Authorities also confiscated 4 laptop computers to review internal records. The primary focus of the inquiry centers on how the manufacturer documents and labels its exported circuit materials.
Investigators are looking into claims that the company bought semi finished boards and raw substrates from mainland China. These parts allegedly went through about 12 processing stages inside Taiwan before receiving a Made in Taiwan label for international shipment. Legal authorities are reviewing whether this multi stage processing legally qualifies the products for local origin certification under trade statutes.
News of the probe sent shockwaves through the local financial market. Unimicron stock reached a historic record of 1230 New Taiwan dollars in morning trading before selling pressure wiped out those gains. The shares reversed course and finished the trading day in the red as reports of the raid surfaced.
Unimicron stands as 1 of the top 3 manufacturers of advanced ABF substrates used in artificial intelligence hardware and high performance computing packaging. The sector has seen massive demand over recent quarters, making the regulatory probe a point of intense focus for global tech supply chains. Prosecutors are keeping further operational details sealed while the investigation proceeds.
