Taiwan Semiconductor Manufacturing Co has begun producing advanced four-nanometer chips for U.S. customers in Arizona, Commerce Secretary Gina Raimondo told Reuters, a milestone in the Biden administration's semiconductor efforts.

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T SMC has started producing chips at its Fab 21 near Phoenix, Arizona, using its 4nm-class process technology, Commerce Secretary Gina Raimondo told Reuters. This marks the first

TSMC's chip foundry in Arizona is not just making one Apple chip, as a second Apple design is reportedly now in production at the facility.

Moreover, AMD Ryzen 9000 CPUs are chiplet designs. While it seems AMD is now having some 8-core CPU dies made in Arizona, the package also contain a 6nm I/O die housing the memory controller and other functionality.

TSMC's Fab 21 in Arizona is gradually ramping up production, and recently it began to manufacture some of AMD's Ryzen 9000-series processors for client PCs as well as some ingredients of Apple's S9 system-in-package (SiP) for smart watches,

TSMC Arizona has just picked up its second contract from Apple: fab will make SiPs (Systems-in-Package) for Apple Watch, as well as A16 chips for iPhones.

TSMC agreed to expand its planned investment by US$25 billion to US$65 billion and to add a third Arizona fab by 2030.

The bulk of TSMC’s production remains in Taiwan, but its efforts to build foundries abroad—notably Germany and the U.S.—seem to be attracting big-name chip customers. (The Germany fab is expected to come online by 2027.

TSMC's Arizona plant has apparently started making Apple Watch chips. Here's everything we know about Apple US production.