Doosan Tesna's recent ₩190.9 billion equipment investment is a definitive sign that the global AI chip supply chain ripple effect has reached Korea's shores.
It all starts with TSMC, the world's leading chipmaker. Demand for powerful AI chips has skyrocketed, overwhelming its advanced packaging capacity, known as CoWoS. This creates a significant bottleneck, as there isn't enough capacity to assemble all the AI processors and memory chips that companies need.
This bottleneck has set off a clear chain reaction. First, to manage the overflow, TSMC is increasingly outsourcing assembly and test work to specialized partners called OSATs (Outsourced Semiconductor Assembly and Test). This is where companies like Doosan Tesna come in. Second, the chips being outsourced, particularly HBM (High Bandwidth Memory), are incredibly complex. They consist of multiple memory layers stacked vertically—up to 12 or even 16 layers. This complexity means they require near-total inspection, which takes significantly more time and resources. Third, this need for more rigorous testing directly fuels a boom in demand for high-end test equipment from global leaders like Advantest and Teradyne.
Doosan Tesna's investment, which amounts to over 8% of its market capitalization, is not a speculative bet. It's a calculated response to this structural shift, preparing its Pyeongtaek Plant 2 to handle the expected surge in outsourced orders. The investment validates that the demand is real and arriving now.
This isn't happening in a vacuum. The entire semiconductor value chain is aligned. Test equipment giants like Advantest are forecasting a 30%+ expansion in the SoC tester market for 2026, citing AI demand. Memory makers like SK Hynix have stated their HBM supply is sold out for the next three years. These signals from upstream and downstream players all point to a sustained, powerful cycle driven by AI.
While the growth trend is strong, it's worth noting that the stock prices of many related companies have already risen significantly, suggesting much of this positive outlook is priced in. Therefore, a prudent approach would involve monitoring not just the demand but also the execution, installation timelines, and potential policy risks.
- Glossary -
- OSAT (Outsourced Semiconductor Assembly and Test): A company that provides third-party services for packaging and testing semiconductor chips.
- CoWoS (Chip-on-Wafer-on-Substrate): TSMC's high-performance packaging technology that integrates different chips, like logic and HBM, onto a single base, crucial for AI accelerators.
- HBM (High Bandwidth Memory): A type of RAM that stacks memory chips vertically to achieve much faster data transfer speeds, essential for data-intensive AI applications.