U.S. PCB Supply Drops from 30% to 4% as China Dominates AI Chip Manufacturing

According to CNBC reporting in May 2026, printed circuit boards (PCBs) made in the U.S. have plummeted from 30% of global supply to just 4%, while China now manufactures over 60% of the world's PCBs. The shift poses significant national security concerns, as PCBs underlying AI chips and defense systems present vulnerabilities for malicious component insertion. U.S. Defense Department officials warn that compromised PCBs could cause missiles to malfunction. TTM Technologies and Sanmina, the only two publicly traded U.S. PCB manufacturers, are expanding domestic production amid surging demand. TTM shares have gained nearly 500% in the past year. The U.S. government is advancing subsidies—including a proposed 25% tax credit and $3 billion in grants—and will require defense electronics to use domestically made PCBs beginning in 2027.
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