A visit to Samsung’s massive new semiconductor hub

Generative AI models run on powerful chips known as GPUs, which depend on stacks of specialized memory chips packaged with the processor. To meet growing demand for memory, Samsung is building a massive new semiconductor manufacturing complex in Pyeongtaek, South Korea. Three fabs already operate around the clock, and a fourth is coming online.

Construction of a fifth was halted during a drop in demand for memory chips in 2024 but restarted when the AI boom sent demand soaring. It’s just before noon on a Monday, and construction workers are pouring out of Samsung’s fabs in Pyeongtaek, a farming city south of Seoul where rice paddies abut a sprawling chipmaking complex. Thousands of workers, dressed head to toe in black with sky-blue vests, take off helmets bearing their names and fab numbers.

They walk to lunch, sweaty and flushed, in chunky sneakers capped with yellow rubber toe guards. Some hop on scooters or motorcycles to get around the campus, which covers an area about the size of New York City’s Central Park. They’ll dine at buffets, diners, and beef stew joints, walking past banners advertising short-term leases for studio apartments.

Some stop by real estate offices to inquire, stepping up to the same counters where Samsung’s salaried engineers buy new homes. In front of the fourth fab, I meet Choi Hye-rin, a 35-year-old safety officer, as she wipes her forehead with a handkerchief. At dawn, she boarded one of the shuttle buses that ferry workers in from Songtan, an older, scrappier district.

She oversees the safety of a crew responsible for building cable ducts. She writes reports, inspects equipment, and checks the chemicals the workers handle. She’s one of hundreds of women working on site, many employed as spotters who walk ahead of heavy equipment.

Safety is a big deal here. After lunch, construction picks right back up. Excavators move past rust-red steel structures rising high under tower cranes.