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DEEP RESEARCH · SEMICONDUCTOR GLASS SUBSTRATES

Glass Substrate Process and the SCHMID-AVACO Role

A process-by-process view of why glass substrates matter for AI/HPC packaging and where equipment bottlenecks may emerge.

Published: 2025-02-23 · Industry/equipment value-chain analysis · Naver Blog

Investment decisions are your responsibility. This material is research, not a recommendation to buy or sell.

0. Bottom line first

The core point is not only the glass substrate itself, but the ability to integrate the process equipment. Across TGV drilling, etching, metallization, plating, and inspection, the SCHMID-AVACO partnership could become meaningful if glass substrate mass production opens up.

Glass substrates are being discussed as a next-generation replacement candidate for organic package substrates. Because of thermal behavior, dimensional stability, and high-density interconnect potential, Intel, AMD, Broadcom, NVIDIA, SKC Absolics, Samsung Electro-Mechanics, and LG Innotek are all relevant names in the ecosystem.

Official fact: The source cites a market report forecasting the global glass substrate market at roughly USD 4.2 billion, or about KRW 6 trillion, by 2034. Intel publicly discussed glass substrate development and late-2020s deployment in September 2023.

Interpretation: This is still an early market. Customer qualification, equipment orders, yield, and process cost reduction matter more than theme momentum.

Glass substrate investment mapProcess integration and mass-production qualification matter most
MaterialSCHOTT·Corning·AGC
TGVLaser vias·etching
MetallizationAVACO sputter·seed layer
Plating/inspectionSCHMID wet process·turnkey
High-density interconnect for AI/HPC chiplet packaging

1. Why glass substrates matter

As AI accelerators and chiplets grow larger and denser, substrate stability and fine interconnect capability become more important. Glass offers advantages in flatness and dimensional control, making it a candidate for finer wiring and larger package formats.

At the material stage, SCHOTT, Corning, and AGC supply thin, flat glass wafers or panels. The source links SCHOTT's substrate and wafer page: SCHOTT substrates and wafers.

2. Process flow: from glass panel to package substrate

StepRoleCompanies/points
Glass preparationThin, flat glass through methods such as downdraw, plus strengthening and polishingSCHOTT, Corning, AGC
Laser TGVThrough-glass vias at tens-of-micrometers scalePhiloptics, LPKF
Wet etchingHF-based cleanup and via-shape tuningSCHMID wet-process know-how
MetallizationTi/Cu seed layer by sputteringAVACO large sputter experience
Plating/patterningCopper fill and circuit formationSCHMID PCB/substrate plating capability
Inspection/reliabilityVia fill, surface defects, warpage, and electrical continuityMass-production yield gate

Official fact: The source cites Philoptics' approximately 10 micrometer-class laser TGV capability via Asia Economy and LPKF's LIDE network article.

3. Why SCHMID-AVACO matters

AVACO brings large-area display sputter experience to continuous vacuum metallization for glass substrates. SCHMID contributes wet processing, etching, plating, cleaning, and substrate-line know-how. The partnership is therefore more about connected process capability than a single tool.

AVACO

Dry metallization

Extends display sputtering into seed-layer deposition for glass substrates.

SCHMID

Wet process and plating

Uses etching, cleaning, plating, and patterning experience in substrate production.

Joint value

Production toolset

Targets customer qualification and yield through a more integrated line approach.

4. Competition and risk

  • Opportunity: AI accelerators, HPC, and chiplet packages could require denser interconnects.
  • Equipment demand: Larger substrates and panel-level formats could expand metallization, plating, and inspection demand.
  • Risks: Yield, cost-down, customer in-house development, rivals, and delayed adoption remain key variables.

5. My watchlist

I would track pilot lines, customer qualifications, repeat equipment orders, metallization/plating yield, and packaging roadmaps. SCHMID and AVACO may have long-term upside if the market opens, but the near-term evidence should come from qualification and orders, not from the theme alone.

Sources