AGY Launches New L-HDI Glass Fiber, Completing AI-Centric Product Portfolio

AIKEN, S.C.--(BUSINESS WIRE)--AGY, the leading US manufacturer of specialty glass fiber products, is proud to announce the launch of L-HDI, a new Low Coefficient of Thermal Expansion (CTE) glass fiber engineered specifically for advanced packaging substrates and chip packaging in next-generation AI hardware.

This product marks a significant milestone for AGY, as L-HDI completes the company’s AI-focused glass fiber portfolio, which now includes a full range of solutions optimized for the semiconductor, high-performance computing, and advanced networking sectors. The L-HDI product provides dimensional stability, thermal reliability, and mechanical integrity essential for AI-specific integrated circuit packaging, particularly for high-density interconnect (HDI) and substrate core materials.

“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. “As AI systems evolve and require more precise, thermally stable materials, AGY is proud to meet this demand with next-generation glass fiber technologies manufactured right here in the United States.”

Key Features of L-HDI:

• Ultra-Low CTE for improved warpage control in IC substrates
• High modulus to resist deformation when exposed to heat and mechanical stress
• Excellent dimensional stability under high thermal cycles
• Optimized for IC substrate manufacturing
• Made in the USA, supporting domestic supply chain resilience

AGY’s glass fiber offerings—including L, L2, and now L-HDI—are used across a range of AI-enabling components, from optical transceivers and high-speed routers to IC substrates and semiconductor packaging.

As AI infrastructure continues to scale globally, AGY remains committed to developing and supplying the most advanced glass fiber solutions from its operations in Aiken, South Carolina. The addition of L-HDI reaffirms AGY’s leadership in performance materials for the world’s AI-driven digital transformation.

About AGY

AGY is a leading innovator and manufacturer of specialty glass fibers enabling high-performance composite solutions for aviation, defense, electronics, artificial intelligence, digital connectivity and architecture applications that are integral to civilian life and critical to the national security supply chain. Headquartered in Aiken, SC, AGY is the singular remaining specialty glass fiber manufacturer in the United States. Flexible production operations, R&D teams, and a product innovation center allow AGY to customize material solutions and develop next-generation products for clients globally.