What is the primary purpose of the joint venture between Sumitomo Chemical’s subsidiary Dongwoo Fine-Chem and Samsung Electro-Mechanics?

The primary purpose of the joint venture—tentatively named Glassem—is to establish a new company focused on the business of glass core substrates for advanced semiconductor packages, with the goal of building a supply system by the second half of fiscal 2027 and gradually expanding capacity to meet growing demand, especially for AI-related semiconductors requiring larger package sizes, higher-density wiring, and improved reliability.

How do glass core substrates differ from conventional substrates, and why are they important for AI semiconductors?

Glass core substrates are next-generation semiconductor package substrates known for their excellent rigidity, dimensional stability, low warpage, and low thermal expansion—properties that enable larger package sizes, improved reliability, and higher-density wiring, which are key requirements for the latest AI-related semiconductors expected to see significant growth in package size and density.

Sumitomo Chemical, Samsung Electro-Mechanics form glass core substrates JV

Jul 2, 2026

Sumitomo Chemical and Samsung Electro-Mechanics plan to establish a joint venture, Glassem, to produce glass core substrates for advanced semiconductor packages by 2026, aiming to meet surging AI-driven demand for high-density wiring.

chemweek

2026-07-02

Sumitomo Chemical, Samsung Electro-Mechanics form glass core substrates JV

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