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A former Samsung Electronics employee who later joined Chinese memory chipmaker ChangXin Memory Technologies, or CXMT, was reportedly sentenced by the Seoul High Court on Oct. 22 to five years in prison for leaking Samsung's technology.
The sentence was reduced from seven years at his first trial in April. The former employee had joined CXMT in 2016.
The case highlights an intensifying battle over semiconductor know-how as Chinese chipmakers narrow the gap with established rivals, putting the race for top engineering talent increasingly at odds with efforts to protect trade secrets.
In 2023, a South Korean court granted Samsung's request to block a former DRAM researcher from joining U.S. rival Micron . It ruled that the two-year non-compete was not excessive and was necessary to protect Samsung's technology and business information, JoongAng Ilbo reported .
A decade ago, Chinese memory chipmakers were not Samsung's biggest concern when it came to losing experienced engineers.
Instead, the South Korean company was more focused on employees leaving for established rivals such as SK Hynix and Micron, according to a former employee who asked not to be identified because the information was private.
Samsung has been monitoring where certain departing employees went — to signal to remaining staff that moving to competitors would be difficult — according to a former employee.
The company also used non-compete agreements restricting employees from joining rivals for two years, as part of their employment contracts, with senior employees holding valuable technical expertise likely facing closer scrutiny.
But Samsung's concern extended beyond individual departures.
"It wasn't just about one employee leaving. The company wanted to send a message to those who stayed that moving to a competitor wouldn't be easy," the former employee said.
Meanwhile, Chinese semiconductor companies have sought to close the technology gap by recruiting experienced overseas engineers with high salaries, stock options, housing and family support, according to Jeongku Choi, a senior analyst at Counterpoint Research.
Their expertise has helped Chinese chipmakers overcome technical bottlenecks, particularly as U.S. export restrictions have limited China's access to advanced chipmaking equipment, Choi said.
Once viewed as unlikely to catch up with established players, Chinese manufacturers are now seen as "meaningful competitors," she added.
Counterpoint's Memory Tracker for the second quarter of 2026 projected CXMT's share of global DRAM revenue would reach 10%.
Established chipmakers are strengthening legal protections and internal security measures while adjusting compensation packages to retain key engineers, according to Choi.
South Korea has also designated certain semiconductor manufacturing technologies as " National Core Technologies ," raising the penalties for unauthorized leaks of those technologies, Choi said.
The legal battle could intensify as Chinese memory companies expand beyond their home market.
"I believe that this management of trade secrets will expand its scope even further to IP and legal areas once Chinese memory companies move beyond the Chinese market a…