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.

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.

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

Apple is now fabricating its S9 chip for the Apple Watch in the U.S. for the first time. The chips are being manufactured at TSMC’s Arizona facility.

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.