Silicon Photonic Integrated Chips for the Internet of Bodies (IoB)

TSMC has started producing chips at its Fab 21 near Phoenix, Arizona, using its 4nm-class process technology.It is to believed that TSMC's Fab 21 in Arizona is manufacturing at least three processor models: the A16 Bionic system-on-chip used in Apple's iPhone 15 and iPhone 15 Plus; the main processor of Apple's S9 system-in-package for smartwatches, which has two 64-bit cores and a quad-core neural engine; and an AMD Ryzen 9000-series CPU. These chips are produced on TSMC's 4nm-class—N4 and N4P—process technologies.

“For the first time ever, we are making leading-edge 4nm chips on American soil.”

"That's a big deal -- never been done before, never in our history. And lots of people said it couldn't happen," 

Commerce Secretary Gina Raimondo

The TSMC Arizona project is instrumental to the U.S. goal of producing 20% of the world's most advanced logic chips by 2030, which was set a few years before the Biden Administration enacted the CHIPS and Science ACT.

CHIPS and Science Act (pdf)