Through-Glass Vias
Glass Core Substrates: Promise, Cracks and a Realistic Timeline
Intel put glass core substrates in the headlines in September 2023 and said complete solutions would reach the market in the second half of this decade. More than three years on, a technical note from the IEEE Electronics Packaging Society, updated in November 2025, still says glass has yet to be commercialised. Both statements can be true, and the gap between them is the subject of this post. Glass solves real problems in large AI packages, b…