Doosan's acquisition of SK Siltron is a landmark deal set to create a fully integrated semiconductor materials and services powerhouse.
The timing of this acquisition is critical. The explosive growth in AI servers and HBM (High Bandwidth Memory) has created a structural, long-term shortage of 300mm silicon wafers. SK Group's own chairman, Chey Tae-won, even remarked that this wafer shortage could last until 2030. This industry backdrop dramatically increased the strategic value of a major wafer manufacturer like SK Siltron, making it an irresistible asset for a company looking to deepen its semiconductor footprint.
The deal itself is structured in a clever two-step process. First, Doosan will acquire the 70.6% stake held by SK Inc. around the end of May. Second, it will purchase the remaining 29.4% personally held by Chairman Chey by the end of the year. This comprehensive approach not only gives Doosan full control but also resolves a long-standing governance issue for SK, which had faced scrutiny from fair trade authorities over the chairman's personal stake.
A major breakthrough that unlocked the deal was the agreement to liquidate SK Siltron's Silicon Carbide (SiC) wafer business. This division, acquired from DuPont in 2020, had become a significant financial burden, posting large losses and carrying debt with early repayment triggers (EOD clauses). By agreeing to shut it down, both parties removed a major risk from the balance sheet, which allowed them to settle on a fair valuation for the profitable core silicon wafer business.
Ultimately, this move is the final piece in Doosan's strategic puzzle to become an 'AI Infrastructure Group'. The acquisition completes a powerful vertical value chain: starting with wafers from SK Siltron, moving to copper clad laminates (CCL) for circuit boards, and finishing with back-end testing services from Doosan Tesna. This integration gives Doosan a unique position to capture growth across the entire semiconductor manufacturing cycle, driven by the unstoppable AI trend.
- Wafer: A thin slice of semiconductor material, such as silicon crystal, upon which microcircuits are etched. It is the fundamental building block for semiconductors.
- EV/EBITDA: A financial ratio that compares a company's Enterprise Value (EV) to its Earnings Before Interest, Taxes, Depreciation, and Amortization (EBITDA). It's used to value a company and is often used in acquisition contexts.
- HBM (High Bandwidth Memory): A high-performance RAM interface for 3D-stacked memory, crucial for AI and high-performance computing applications due to its ability to transfer data at very high speeds.