SK hynix is positioning its Cheongju production site as a key hub for artificial intelligence (AI) memory's front-end and back-end processes. Once primarily focused on NAND production, Cheongju is being transformed into a center for high-bandwidth memory (HBM) with the introduction of M15X and P&T7. This investment marks a clearer strategy for SK hynix's production facilities.
According to industry sources on July 23, SK hynix's board of directors approved a facility investment of 7.931 trillion won for the construction of P&T7. This amount represents 5.88% of the company's equity. P&T7 will handle packaging and testing, making it the company's seventh packaging and testing plant, which broke ground in April.
Analysts emphasize the timing of the investment rather than its size. The company stated, "This announcement reflects an accelerated investment schedule, leading to an increase in the board's resolution amount. The previously announced total investment of 19 trillion won remains unchanged." The decision to expedite funding is aimed at responding to increased production demands and shortening cleanroom operational timelines.
This investment further clarifies SK hynix's production landscape. Icheon is established as the center for DRAM production and technology development, while Yongin will serve as a long-term hub for mass production of next-generation DRAM. Cheongju has emerged as a key AI memory hub, managing both the front-end processes of M15X and the back-end processes of P&T7. Meanwhile, Indiana in the U.S. will focus on responding to North American big tech clients and conducting research and development for next-generation HBM packaging.
Historically, Cheongju has been heavily associated with NAND production, housing M11, M12, and M15 facilities. With the addition of M15X, it will expand its capabilities for next-generation DRAM and HBM production. Once P&T7 is operational, Cheongju will transform into a comprehensive production site with both front-end and back-end processes.
This restructuring is seen as a response to the evolving nature of HBM competition. While traditional DRAM competition was based on fine processing and wafer production capacity, HBM requires stacking and connecting multiple DRAM chips produced in the front-end process, followed by verification. Industry experts explain that packaging yield and testing capacity directly influence actual supply volumes.
The investment in P&T7 is interpreted as targeting this bottleneck. Even if front-end production capacity increases, without corresponding back-end processes, the volume delivered to clients will not rise. To supply HBM in line with AI semiconductor clients' roadmaps, it is essential to secure both packaging and testing capabilities.
An industry insider noted, "HBM does not simply increase supply by producing more wafers. The back-end capabilities for stacking, connecting, and verifying must keep pace to enhance the supply capacity perceived by clients."
There are observations that SK hynix's focus on Cheongju is driven by this need. With M15X and P&T7 located in the same area, the speed of connection between front-end and back-end processes can be improved. It is also expected that yield improvements and quality verification feedback during mass production will accelerate.
SK hynix CEO Kwak No-jung has also formalized the expansion of Cheongju's role. During the announcement of investment plans for the Chungcheong region this month, he stated, "We plan to invest 100 trillion won in Cheongju, including 80 trillion won for M17, which will produce NAND, and 20 trillion won for enhancing advanced packaging with P&T7." He added, "We will reposition Cheongju as a core hub driving the competitiveness of South Korea's memory semiconductor industry."
Industry reactions suggest that this decision shifts the competition for HBM leadership from product technology to production system competition. For clients, the performance of HBM and the reliability of timely deliveries are becoming increasingly important.
* This article has been translated by AI.
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