Who makes glass-core substrates for AI data centers
Glass-core substrates (emerging)
Substrates that use a glass core instead of an organic laminate, an emerging alternative aimed at the largest, most demanding AI packages.
Glass-core substrates are a still-emerging alternative to conventional ABF substrates (ABF / high-layer package substrates), aimed at the flatness, size, and layer-count limits that the largest AI accelerator packages are starting to run into. They occupy the same position in the chain as ABF substrates — between the interposer and the server board — but represent a materials shift rather than an incremental improvement on the existing substrate supply base, with a different set of suppliers, some overlapping with existing substrate and materials makers and others entirely new to the space. For investors, this is a call-option-shaped position rather than a current-revenue one: adoption depends on which upcoming accelerator generations qualify glass-core substrates as viable at volume, a decision made jointly by chip designers and packaging houses rather than by the substrate makers alone. Because it's an emerging technology rather than an established one, supplier lists here are the least settled of anywhere in this layer and should be treated as leads to verify rather than confirmed production relationships.
AI delta: AI package sizes and layer counts are pushing conventional substrate materials toward their physical limits, which is the specific pressure pulling glass-core substrates from lab work toward qualification.
Companies on this part (6)
| Company | Role | Ownership | Ticker | Price | 1d | Confidence | Note |
|---|---|---|---|---|---|---|---|
| Absolics · unit of SKC | manufacturer | subsidiary | 011790.KS* | inferred | |||
| AGC | manufacturer | public | 5201.T | 5447 JPY | -0.4% | inferred | |
| Corning | manufacturer | public | GLW | 124 USD | +0.8% | inferred | |
| Intel | manufacturer | public | INTC | 86.96 USD | +2.6% | inferred | |
| Samsung Electro-Mechanics | manufacturer | public | 009150.KS | 1122000 KRW | -2.0% | inferred | |
| Unimicron | manufacturer | public | 3037.TW | 1085 TWD | -1.4% | inferred |
Who competes here
The same table read the other way: every company above competes for glass-core substrates sockets. Confidence tags matter — an inferred placement is a lead, not a confirmed rivalry.
Nearby parts
- Previous in layer: Substrate materials
- Next in layer: Interposers, silicon bridges, RDL
- Layer: Layer 1 — Compute silicon & packaging
Latest feed
- Samsung Electro-Mechanics wins KRW360.5 billion memory substrate deal as AI demand drives expansion — DigiTimes, 2026-10-21Samsung Electro-Mechanics won a large contract to supply package substrates for memory semiconductors due to rising AI demand.
- AUO selects glass substrate specs for semiconductor processes, not size rivalry — DigiTimes, 2026-10-20AUO is customizing its glass core substrate specifications for semiconductor process needs instead of focusing on panel size competition, aiming to supply OSAT leaders like ASE and Powertech.
- Daeduck Electronics targets 2029 ceramic substrates for AI packaging — DigiTimes, 2026-10-20Daeduck Electronics is developing ceramic core substrates as a potential replacement for glass cores in next-generation, large-area AI semiconductor packages, aiming for mass production by 2029.
- AI substrate bottleneck shifts from design to manufacturing — DigiTimes, 2026-10-20The increasing size, layer count, and power demands of accelerator substrates are causing the primary industry bottleneck to shift from design limitations to physical manufacturing capacity.
- TPK targets 2028 TGV mass production with NT$6 billion investment — DigiTimes, 2026-10-20TPK Holding has initiated joint development with packaging companies for glass-substrate through-glass via (TGV) technology, aiming for mass production by 2028.
- Beyond displays: AUO eyes co-packaged optics, glass core substrates for AI-era growth — DigiTimes, 2026-10-19AUO is targeting co-packaged optics and glass core substrates to support the growth of AI-era computing.
- Samsung Electro-Mechanics' US$5.1 billion expansion faces equipment supply constraints — DigiTimes, 2026-10-17Samsung Electro-Mechanics' planned expansion for AI server substrate production is reportedly facing equipment supply constraints and longer delivery times from machinery manufacturers.
- BOE's 24-layer glass substrates reach AI chip packaging trials, with mass production still ahead — DigiTimes, 2026-10-16BOE is testing its 24-layer glass substrates for AI chip packaging, although mass production is not yet expected.
- Beyond Lithography: 3D Scaling Puts New Demands on Materials — EE Times, 2026-10-14ASM International discusses the critical role of materials and process innovations required to support increasingly complex 3D semiconductor packaging and scaling.
- Europe’s Advanced Packaging Gap: Fraunhofer, Swissbit Target the Missing Middle — EE Times, 2026-10-13Fraunhofer and Swissbit are collaborating to address the shortage in the 'missing middle' of advanced packaging for high-performance computing and AI hardware.
Questions about glass-core substrates
- What are glass-core substrates?
- Substrates that use a glass core instead of an organic laminate, an emerging alternative aimed at the largest, most demanding AI packages.
- Which companies make glass-core substrates for AI data centers?
- This catalog lists 6 companies on Glass-core substrates, 6 of them with listed equity: Absolics, AGC, Corning, Intel, Samsung Electro-Mechanics, Unimicron.
- How does AI change demand for glass-core substrates?
- AI package sizes and layer counts are pushing conventional substrate materials toward their physical limits, which is the specific pressure pulling glass-core substrates from lab work toward qualification.
- How reliable are these glass-core substrates supplier placements?
- The 6 placements on this part break down as 6 inferred. "disclosed" means the company or a filing says so; "reported" comes from trade press or a reference-design list; "inferred" is a taxonomy lead with no citation yet.
Sources: placements without a source URL come from the taxonomy seed and are tagged accordingly. How this data is built.· Markdown · JSON