Semiconductors accounted for nearly four in 10 cases of industrial technology leaks in South Korea, according to data compiled by Yonhap News Agency, underscoring how the country's most valuable export sector has become its most targeted.

The figures highlight the scale of industrial espionage pressure on a chip industry anchored by Samsung Electronics and SK hynix, the world's leading producers of memory semiconductors. For a country whose economy depends heavily on technology exports, the concentration of leak cases in the semiconductor sector reflects both the commercial value of the technology involved and the intensity of foreign efforts to obtain it.

South Korean prosecutors and investigators have repeatedly flagged attempts by overseas actors to recruit engineers from domestic chipmakers and suppliers, seeking process know-how that took decades and billions of dollars in fab investment to develop. Memory production in particular relies on tightly held manufacturing recipes for scaling density and yield — intellectual property that cannot easily be replicated and that gives Samsung and SK hynix their competitive edge against rivals such as Micron and China's emerging memory makers.

The data showing semiconductors at nearly 40% of leak cases places the chip industry far ahead of other strategic sectors in South Korea's technology-protection docket. It also aligns with the government's designation of semiconductors as a national core technology, a status that carries heightened criminal penalties for unauthorized transfer abroad.

The commercial stakes are substantial. South Korea's semiconductor exports constitute one of the largest single lines in the country's trade balance, and the leakage of process or design technology to competitors — particularly to state-backed players in China racing to close the gap in memory and logic production — could erode margins and market share built on sustained capital expenditure in advanced fabs.

For Samsung and SK hynix, protecting process know-how has become inseparable from protecting revenue. Both companies invest tens of trillions of won annually in capacity and R&D, and both operate under tightening export-control regimes in the United States, Japan and the Netherlands that restrict access to advanced chipmaking equipment. That same geopolitical environment has raised the value of illicitly acquired technology for actors seeking shortcuts around those controls.

The pattern documented in the data suggests the threat is structural rather than episodic: as long as South Korean firms hold leading positions in memory and advanced packaging, the incentive to target their engineers and trade secrets will persist. Authorities will likely respond with stricter screening of departing personnel and heavier prosecutions under the national core technology law, while chipmakers tighten internal controls around process documentation and fab access.