AGY has introduced L-HDI, a new low coefficient of thermal expansion (CTE) glass fiber designed for high-density interconnect (HDI) substrates and chip packaging in advanced AI hardware. Produced at the company’s Aiken, South Carolina facility, L-HDI targets dimensional stability, thermal reliability, and mechanical integrity requirements in AI-optimized integrated circuit packaging.
The launch completes AGY’s AI-focused glass fiber portfolio, which now includes the L, L2, and L-HDI product lines for semiconductor, high-performance computing, and networking markets. L-HDI’s properties—ultra-low CTE, high modulus, and stability under high thermal cycling—are engineered to mitigate warpage, resist heat-induced deformation, and maintain precision in IC substrates. The product also supports domestic supply chain resilience by being entirely manufactured in the United States.
AGY’s specialty glass fibers are used in components such as optical transceivers, high-speed routers, and semiconductor packages. The company remains the only U.S.-based specialty glass fiber manufacturer, with R&D and production capabilities dedicated to aerospace, defense, electronics, AI, and digital connectivity markets.
• Ultra-low CTE for improved warpage control in IC substrates
• High modulus for resistance to thermal and mechanical stress
• Excellent dimensional stability in high thermal cycles
• Optimized for IC substrate manufacturing
• Made in the USA to bolster domestic supply chains
“With the introduction of L-HDI, AGY now offers a complete portfolio of glass fiber products tailored to AI infrastructure,” said Patrick Hunter, Executive Vice President, Commercial at AGY.
🌐 Why it Matters: As AI hardware density increases, substrate materials must maintain strict dimensional tolerances and thermal performance. U.S.-made specialty glass fibers like AGY’s L-HDI can help reduce dependence on imported materials while enabling the next generation of semiconductor packaging performance.
