By Jeff Fitzgerald
Director Of Advanced Packaging Strategy, FuzeHub
This May, the Glass4Chips Summit will unite FuzeHub, SEMI, and NY Creates with leaders across industry, research, and government to address rising demand for glass substrates and advance US innovation and supply chain resilience. Glass-based microsystem packaging presents a once-in-a-generation opportunity to strengthen critical infrastructure.This partnership is convening the experts that will collaborate on a strategic action plan harnessing this nascent technology for long-term national security and economic prosperity.
The Pivot to Glass
For nearly two decades, glass-based substrate research has progressed in via formation, patterning techniques, and large panel formats. The recent shift from monolithic System-on-Chip (SoC) designs to modular chiplets, driven by physical scaling limits and yield economics, has increased the need for larger substrates capable of supporting complex System-in-Package (SiP) architectures. These solutions are especially necessary for High-Performance Computing (HPC) and AI, which require dense, low-loss, and high-bandwidth interconnections. While glass is prized for its stability and scalability, its full potential extends far beyond these traits. To fully exploit the comprehensive qualities of this platform technology, FuzeHub is spearheading Glass4Chips (G4C), a consortium initiative designed to unite glass-based microsystem expertise.
The Utility of Glass
While glass represents an important family of material solutions for advanced packaging, it is important to choose the right glass type for the application. There are numerous glass compositions and manufacturing processes to produce a variety of different properties. Recently, the semiconductor industry has been aligning itself to advance borosilicate glass with organic polymer redistribution layers (RDLs) which intends to leverage incumbent Printed Circuit Board (PCB) fabrication and display glass handling technologies in order to scale quickly. This pivot in the PCB industry still requires offshore-produced polymer materials and processing equipment. Engineered for the superior adhesion of large-area chips, this material combination ensures stability in controlled data center environments.
For applications that require ultra-low electrical and optical loss, fused silica is an excellent solution. High Purity Fused Silica (HPFS) effectively restricts electron flow losses in high frequency (mmWave) applications and light absorption and scattering in photonic applications better than any other incumbent packaging material making it ideal for hybrid signal transmission in heterogeneously integrated microsystems. HPFS is therefore a foundational material for the future of connectivity, supporting everything from advanced 6G and satellite communications to emerging quantum technologies.
Additional key characteristics of HPFS include its low and consistent coefficient of thermal expansion, high mechanical strength, and a uniform, amorphous structure, which minimizes energy dissipation mechanisms like thermoelastic damping and surface loss. These properties will enhance the performance of high-precision position, navigation, and timing systems and offer unique thermal management solutions for devices operating in extreme environments such as MEMS switches and dilution refrigerator components.
Glass Substrates Drive Sovereignty
The key takeaway is that glass materials solve thermomechanical and energy efficiency needs in a number of emerging applications tied to urgent geopolitical priorities. This convergence of infrastructure requirements across sectors provides an ideal window for the US to establish leadership in this versatile semiconductor packaging medium. Glass substrates are a critical enabler that impacts a wide range of shared priorities, including technological sovereignty. At FuzeHub, we believe glass materials will revolutionize not only AI systems and various quantum technologies but telecommunications and PNT microsystems as well. Therefore, investments in next generation glass-based innovations and the supporting ecosystem are a different endeavor than the reshoring initiatives of silicon or organic (polymer) technologies.
Glass substrates represent a technology runway for the US economy if their investment is prioritized and a coordinated strategic commercialization plan is developed. The pioneering work with glass substrates originated here in the US but to advance its competitiveness, the US needs an integrated network of glass expertise to drive the innovation, fabrication, and assembly of highly energy-efficient next-gen microsystems.
Securing Domestic Glass Microsystems
Advancing glass technology presents unique challenges compared to broader domestic semiconductor revitalization efforts. A US-based consortium focused on glass substrates will bridge the gap between superior technical capabilities and critical economic and infrastructure priorities. By addressing supply chain risks, from materials and processing to components and equipment, the G4C consortium will accelerate the adoption of glass-based microsystems for national security. Furthermore, it will lead the development of industry standards to de-risk early hurdles, boost domestic manufacturing, and ensure energy efficiency goals are met across critical emerging technologies.
The following are four key motivations for a consortium to work through.
- Geopolitical Security and Supply Chain Resilience
- Scaling capability in multiple US regions
- Technological Advancement for AI, quantum, and PNT
- Improving performance and yield on various form factors
- Setting Industry Standards
- Design, fabrication, assembly, test, and inspection
- Overcoming Economic Hurdles
- Ecosystem gaps, investment strategies, and partnerships
The G4C consortium will be the first of its kind to unify academic excellence, industrial innovation, and regional manufacturing capabilities across the US. The goal being to establish a globally significant, distributed US ecosystem that leads the development, standardization, and commercialization of trustworthy, glass-based advanced semiconductor packaging technologies. FuzeHub is leveraging the Northeast’s specialized knowledge and New York’s manufacturing assets to expand the national glass substrate ecosystem currently led by Georgia and Arizona. FuzeHub contends that while glass is a vital, energy-efficient platform for advanced semiconductor packaging in critical sectors, a dedicated consortium is essential for the US to outpace global competitors and fortify its industrial base.
Join the Glass4Chips Initiative
We invite you to join us on May 14th and 15th as we examine industry demand and market projections, alongside a strategic dialogue on achieving national sovereignty within this rapidly evolving platform technology. Registration is at https://fuzehub.com/glass4chips-registration/. Need to connect sooner? Email us at [email protected] to speak with one of our experts in support of this initiative.