Apple has stepped up its push to expand manufacturing in the United States, and this week the company gave a closer look at how its chips move from raw silicon to finished devices. The effort includes plans to produce some Mac mini models in the US, along with deeper investment in domestic chipmaking partners.
The move reflects a broader strategy to strengthen Apple’s supply chain inside the country, especially at a time when semiconductor production remains heavily concentrated in Asia. Apple designs its chips in the US, but most large-scale manufacturing still happens overseas.
The Wall Street Journal reported on the effort after touring several of Apple’s partner facilities across the country, offering rare behind-the-scenes details about how the US chip supply chain is taking shape.
From Silicon to Wafers in Texas
The supply chain begins at GlobalWafers America in Sherman, Texas, where purified silicon rocks are turned into 12-inch wafers that later hold trillions of transistors. Engineers melt the rocks at 2,500 degrees Fahrenheit inside a 35-foot-tall crystal puller, which grows cylindrical silicon ingots weighing hundreds of pounds. Workers then slice these ingots into thin wafers, polish them, test them, and prepare them for shipment to the next stage.
Inside fabrication plants, automated overhead systems move wafers between machines on tracks that resemble a subway network. These systems handle most of the work, which explains why there are relatively few workers on the factory floor.
As Rolfe Winkler wrote:
“I didn’t see a lot of workers in these facilities. Chip-making is highly automated. The U.S. isn’t trying to reshore the industry because it will drive mass employment. It is doing so to address a strategic vulnerability, and that requires operating competitively.”
His observation highlights that automation drives modern semiconductor production and that competitiveness, not job volume, shapes the policy push.
Advanced Chip Fabrication in Arizona
The next stage takes place at Taiwan Semiconductor Manufacturing Company’s facility in Arizona. There, engineers use extreme ultraviolet lithography machines that cost up to $400 million each to imprint intricate patterns onto wafers. These machines fire lasers into molten tin to generate EUV light and project chip designs with extreme precision.
The Arizona plant produces Apple’s A16 chips, which power devices such as the iPhone 15 and entry-level iPad. However, more advanced chips like the A19 still rely on production in Taiwan, and packaging often happens in Asia.
Final Assembly in Houston
The final stage, known as FATP, takes place at a Foxconn facility in Houston. Workers assemble and test Apple servers, and Apple plans to expand the site to produce Mac mini desktops. This stage involves more hands-on labor compared to chip fabrication, although the Houston operation remains small compared with massive facilities in Asia.
Together, these sites show how Apple and its partners are rebuilding parts of the US chip supply chain. The effort remains far smaller than Asia’s established ecosystem, but it marks a concrete shift toward domestic manufacturing for some Apple products.
