SEOUL -- Nearly three years since Japan imposed export controls on a trio of high-tech materials, South Korea has yet to create domestic supply chains fully independent of Japanese producers.
Three years after Tokyo imposed export controls, reliance continues

A Samsung chipmaking plant. Adopting homegrown materials would require suspending production lines. (Photo courtesy of Samsung Electronics)
SEOUL -- Nearly three years since Japan imposed export controls on a trio of high-tech materials, South Korea has yet to create domestic supply chains fully independent of Japanese producers.