Former SK Hynix employee jailed for leaking chip technology to China

Jeon Mo, a former SK Hynix employee and Chinese national, was sentenced to 18 months in jail after a court in Suwon found he leaked semiconductor manufacturing information to a Chinese firm. The punishment lands in one of South Korea’s most sensitive industries, where process know-how can be as valuable as machinery.

The case centered on the transfer of chipmaking “solutions,” the kind of manufacturing details that can shape output, yield and efficiency at a major memory-chip producer. One account said Jeon printed about 4,000 pages of technical documents before leaving for Huawei, a volume that points to access to a broad set of proprietary material rather than a narrow file grab.

SK Hynix sits near the core of the global semiconductor supply chain, supplying memory chips used in smartphones, data centers and artificial intelligence systems. In that environment, a leak of manufacturing methods or process recipes can do more than undercut one company. It can hand a rival in China a faster route to better chips and weaken years of engineering investment.

South Korea has been tightening its response to this kind of theft. Yonhap reported on Nov. 7, 2024, that another former SK Hynix worker received 1 1/2 years in prison for stealing core chip technology, while on Sept. 13, 2023, an executive at an SK Hynix subcontractor was sentenced to one year for leaking core semiconductor technology to China. Taken together, the cases show courts treating trade-secret theft as a criminal threat to economic security, not just a corporate dispute.

The 18-month sentence also reflects the broader pressure on companies and governments to secure chip data as geopolitical competition intensifies. As chipmaking becomes more central to AI, cloud computing and national industrial policy, South Korea is signaling that industrial espionage against its semiconductor sector will face jail time, not only civil penalties.