Taiwan Semiconductor Manufacturing Co. (TSMC) is set to start mass production at its advanced Arizona facility in 2025, marking a significant step in bringing cutting-edge chip manufacturing to the U.S. This move tests the effectiveness of the 2022 CHIPS and Science Act in bolstering the semiconductor supply chain amidst geopolitical tensions and global chip shortages. TSMC's fab in Arizona, supported by $6.6 billion in CHIPS Act funding, has initially shown better yields than its Taiwanese counterparts. The expansion addresses reliance fears on Taiwan amidst rising Chinese assertiveness. Despite cultural and operational challenges, TSMC and other giants like Samsung and Intel are increasingly investing in U.S. fabs, signaling a shift towards more geographically diversified semiconductor manufacturing.