CXMT hiring push collides with Korea's chip trade-secret laws

A South Korean appeals court sentenced a former Samsung Electronics employee to five years in prison on October 22 for leaking advanced DRAM technology to Chinese memory maker ChangXin Memory Technologies, trimming two years off the seven-year term he received at his first trial in April. The engineer had joined CXMT in 2016, CNBC reported.

The ruling arrives as CXMT reaches a 10% share of global DRAM revenue in Q2 2026, up from 4% a year earlier, enough to make it the world's fourth-largest DRAM maker behind Samsung, SK hynix and Micron. Counterpoint Research senior analyst Jeongku Choi said Chinese memory firms have narrowed the gap by recruiting overseas engineers with "high salaries, stock options, housing and family support."

Lawyers CNBC interviewed in Taiwan, Singapore and Hong Kong framed the enforcement problem as structural: the knowledge walks out with the person. "The difficulty is that often the trade secret is carried in the employee's head," said Jezamine Fewins, head of litigation at Lewis Silkin in Hong Kong. "You cannot 'take' the information back after the engineer has become aware of it," said Zechariah Chan, a partner at Lee & Lee Law Firm in Singapore. Innovatus Law partner Jamie J. Yang argued that any one hire has limits: "There is just very little chance that one person … will know enough to replicate that line."

South Korea has started classifying key semiconductor processes as "National Core Technologies," a designation that raises penalties for unauthorized disclosures under its Industrial Technology Protection Act, and courts have grown more willing to police mobility. In 2023, a Korean court blocked a former Samsung DRAM researcher from joining Micron for the full two-year non-compete period. Taiwan has gone the other way, capping post-employment non-competes at two years and requiring employers to pay at least half of the engineer's former monthly salary during the restricted window.

The case slots into a run of 17 Samsung threads tracked across our Samsung coverage over the past 90 days, most of them about memory's AI-era profit windfall rather than the people building it.