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Context
What happened: Samsung is building a large semiconductor complex in Pyeongtaek, South Korea, where three fabs run around the clock and a fourth is coming online. Construction of a fifth fab was halted during a 2024 memory demand drop and restarted when AI demand rose.
Key numbers: Three fabs operating, a fourth coming online, a fifth restarted; site about the size of Central Park; worker pay
Why it matters: The build-out is Samsung's attempt to reclaim its lead in memory chips after watching domestic rival SK Hynix pull ahead in high-bandwidth models used in Nvidia's AI accelerators.