Why Strong HBM Sales Aren't Enough: The Real Battleground Between Samsung and TSMC
Discover why soaring HBM demand isn't enough for Samsung. Explore the hidden foundry war over base dies and TSMC's growing dominance in AI chips.
In the face of massive technological waves, history constantly reminds us that today's winner can easily become tomorrow's loser. The South Korean semiconductor industry, currently intoxicated by the explosive demand for HBM (High Bandwidth Memory), is actually facing a profound crisis. This threat stems from a quiet yet aggressive tectonic shift happening at the foundation of the foundry ecosystem.
Core Insights
1. Structural Contradictions and the Politics of Space
The internal architecture of modern advanced processors resembles a heavily congested commercial real estate district. A significant portion of a GPU die—boasting massive computing power—was traditionally occupied by physical circuits known as the interface area, which transmits and coordinates silicon signals externally. The economic law of opportunity cost applies without exception inside semiconductor chips. Allocating expensive wafer areas, built through ultra-fine processes, to non-computing circuits meant merely for signal amplification or packing is akin to paying high-end commercial rent in Seoul's Teheran-ro while using the space as a simple logistics warehouse or post office counter. For architecture designers striving to maximize efficiency, this spatial waste was an intolerable symbol of inefficiency.
To solve this spatial politics, big tech design companies, including NVIDIA, initiated bold restructuring. They drastically reduced peripheral circuits unrelated to direct computation within the GPU die and began filling those physical vacancies with pure computing cores. Naturally, the question arose: Where should essential functions like signal amplification and physical connection to the outside of the chip move? The answer lies in the logic chip located at the very bottom of the HBM, known as the base die. Positioned at the boundary between memory and computing devices, this base die has evolved far beyond a simple stacking support. It is now a strategic stronghold absorbing peripheral circuit functions previously handled by GPUs. In this process, the boundary between memory and foundry is blurring, and whoever seizes the design and manufacturing dominance of this base die will control the value-added distribution of the future AI accelerator market.
2. Growing Technical Complexity and Foundry Monopoly
The evolution of semiconductor processes demands system-wide integration and a paradigm shift, going far beyond mere miniaturization. While past semiconductors were a collection of independent chips, today's AI accelerators function like a massive organism where numerous heterogeneous chips are organically combined. As traditional copper-based signal transmission methods hit physical limits, future inter-chip communication is rapidly shifting toward optical communication technology and ultra-high-speed SerDes design. Such complex system-level design and packaging require expertise that far exceeds the capabilities of a single memory semiconductor company. NVIDIA's decision to exclusively outsource the production of next-generation NVHBM base dies to TSMC's 3-nanometer process is not merely a matter of price negotiation power, but an inevitable consequence of this technological roadmap.
The absolute leader of the foundry ecosystem is no longer just a manufacturing plant that produces outsourced chips. Armed with advanced packaging technologies like CoWoS (Chip-on-Wafer-on-Substrate), they enjoy the status of master architects binding countless processors, memory units, and communication devices into a single finished product. The fact that the price of a base die is several times higher than the wafer unit price of a standard core die proves that the design difficulty and added value demanded of logic chips are exploding. While memory manufacturers remain complacent about traditional achievements in high-bandwidth memory stacking technology, foundries are actively seizing the central nervous system of the entire system. This leads to an existential sense of crisis that memory companies could be reduced to mere component suppliers amid changing AI trends. The moment control shifts from memory to foundry, the profit distribution structure within the industry will inevitably undergo a complete overhaul.
3. Samsung Electronics' Dilemma and Strategic Survival
For Samsung Electronics, which perfected the integrated device manufacturer (IDM) model housing both memory and foundry under one roof, the current situation presents an unprecedented strategic dilemma. Contrary to the common belief that a foundry division's top priority customers are massive U.S. big tech companies or external fabless giants, the internal battlefront for survival lies elsewhere. The most urgent top priority task inside Samsung Foundry is not attracting external customers, but securing and stabilizing the yields of advanced base die processes used in next-generation HBM. Under the standardization trend led by NVIDIA, completely losing manufacturing dominance over the base dies to TSMC would mean more than a failure in the foundry business—it would spell a fatal defeat reducing its memory division to a subcontracting base.
This crisis clearly reveals the delicate power dynamics of the global semiconductor supply chain. Big tech companies holding design standards demand standardized manufacturing processes to maximize their profits, while foundries use this to strengthen control over the entire ecosystem. While pure memory enterprises like SK Hynix and Micron face uncertainties stemming from the separation of design and manufacturing, the crisis confronting Samsung Electronics is closer to the fear that the long-held myth of internal synergy may collapse against reality. Behind the glamorous modifier of a memory semiconductor super-cycle, the silent war to capture foundry base dies has already transformed into the front line determining corporate fate. Depending on the outcome of this battle, the territory where the source of wealth governing the global IT ecosystem for decades will flow will be decisively settled.
4. The Era of Paradigm Shift and the Survival Equation for Korean Semiconductors
The history of technological innovation proves that winners are never simply those with volume superiority, but those who seize control of the architecture. The past formula of simply increasing memory capacity and raising yields can no longer guarantee sustainable growth in the era of system integration driven by artificial intelligence. As the center of added value shifts from simple storage devices to computing, communication, and the packaging/logic design that organically combines them, the South Korean semiconductor industry stands at a crossroads of fundamental self-innovation. Instead of resting on micro-achievements like individual component performance, it must coldly examine the depth of the role Korean companies play within the overall system ecosystem.
Ultimately, the question is crystal clear. In the upcoming era of optical communication and advanced packaging, will South Korea's semiconductor giants remain mere subcontracted cogs producing well-selling parts, or will they be reborn as true architects of civilization governing the design and standards of entire systems? The time to find that answer will not wait for us, and strategic choices made over the next few years will serve as the absolute watershed determining the future of the South Korean economy.
"Will South Korea's semiconductor giants remain mere subcontracted cogs, or become true architects of civilization governing system standards?"
This post is based on content from the YouTube channel 이효석아카데미.
Watch the original video: https://youtu.be/6yKGQn4olaw
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