Silex acquires Onsemi fab in Pennsylvania for $40 million - Evertiq

Swedish MEMS foundry Silex Microsystems has acquired a 200mm semiconductor fab in Mountain Top, Pennsylvania, from Onsemi for $40 million. The facility, covering 3,000 sqm of existing cleanroom space ... Read original →

Silex’s $40M acquisition of onsemi’s Pennsylvania 200mm fab isn’t just capacity scaling—it’s a geopolitical recalibration of MEMS foundry dynamics. Technically, converting the cleanroom will accelerate standardization of 8-inch MEMS processes, pressuring Lam and TEL to retrofit legacy tools with advanced etch/bonding modules, raising entry barriers for smaller players. On compliance, while CFIUS approval is likely, tightening U.S. CHIPS Act scrutiny on firms with non-ally ownership may force Silex to restrict orders from Taiwan, China-based clients. Competitively, TSMC’s MEMS unit and X-FAB will respond: TSMC could fast-track its Arizona MEMS line, while X-FAB may lock in European auto OEMs via long-term deals. Within 18 months, this deal will fuel North American supply chain de-risking sentiment, especially in inertial sensors and RF filters, potentially adding 5–8% BOM premiums for localized manufacturing.