Glass Core Substrates Roadmap

A comprehensive technical roadmap from organic substrates to Glass Core Substrates, silicon interposer integration, Co-Packaged Optics, and the physics of reliable scaling.

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About the Author

Joe Harden is an independent expert with over 30 years in semiconductor manufacturing. He brings deep experience in yield engineering, process integration, and advanced packaging. He is the inventor of the Harden Criticality Index (HCI) framework and recently filed a non-provisional patent application on physics-based predictive reliability modeling for glass core substrates.

How I Work With Organizations

I help teams navigate the glass core substrate transition through:

  • Strategic roadmapping and architecture evaluation

  • Technical diligence on GCS and CPO programs

  • Advisory on reliability modeling and yield risk reduction

For serious inquiries, please reach out directly or visit waferforge.com.

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© 2026 Joe Harden — Independent Expert on Advanced Packaging SubstratesGlass Core Substrates Roadmap • LinkedIn Series • waferforge.com