SK Hynix Q2 Silicon Wafer Procurement Surges 104% QoQ, Gearing Up for HBM Capacity Expansion
nashnova research
SK Hynix doubled its silicon wafer purchases in Q2, far outpacing Samsung. This means → the AI memory chip arms race has escalated from fighting over fab capacity to locking up raw materials, with upstream price hikes now taking shape.
Why did wafer purchases double?
Per DIGITIMES, SK Hynix's Q2 2026 silicon wafer spending rose 104% quarter-on-quarter, significantly outpacing Samsung.
Silicon wafers — ultra-thin discs of purified silicon, the foundation every chip is built on — are a core cost in semiconductor manufacturing.
This means → SK Hynix expects wafer prices to rise and is locking in volume now at today's price to cap future cost swings.
In plain terms = demand didn't suddenly double; the company is filling the warehouse before the price tag goes up.
How big is the capacity expansion, and what funds it?
To support next-gen HBM4 — fourth-generation high-bandwidth memory, the "ammo rack" that feeds data to AI chips — SK Hynix has nearly doubled its 1C DRAM expansion plan, targeting 170,000–200,000 wafers per month by end of Q1 2027.
It also plans to invest $4 billion in a next-generation HBM packaging plant in Indiana, USA.
The war chest comes from Q1 results: revenue of KRW 52.58 trillion, up 298% YoY; net margin above 70%; average DRAM and NAND prices both hit all-time single-quarter highs.
This means → margins are fat enough to fund three bets at once — raw materials, fab capacity, and an overseas plant.
Where does the technology stand?
SK Hynix has developed a 1c-node 16 GB LPDDR6 chip, advancing next-gen mobile memory.
On the NAND side, it has completed mass-production validation for 375-layer NAND, introducing molybdenum in place of tungsten in word-line metal gates for the first time. Volume production is planned before year-end.
In plain terms = more layers mean higher storage density; the switch to molybdenum matters because tungsten's resistance climbs too high at ultra-narrow widths, and molybdenum lets signals travel faster.
Why can equipment suppliers suddenly raise prices?
SK Hynix broke with industry practice, opening a price-adjustment window for key equipment suppliers and allowing tier-one vendors to raise prices by 3%–4%.
This reflects the end of five years of continuous equipment-price cuts — when the customer is racing to expand, bargaining power shifts from buyer to seller.
In the 375-layer NAND molybdenum-process tool evaluation, SK Hynix chose Tokyo Electron's batch furnace system over Lam Research's single-wafer tool.
This means → heavy reliance on specific process tools further erodes the buyer's negotiating leverage.
What is the next checkpoint in this arms race?
From doubling wafer purchases to tolerating equipment price hikes, SK Hynix's moves show that the AI-driven capacity race is deepening memory giants' dependence on upstream suppliers.
The key validation point: whether silicon wafer makers and core equipment suppliers can sustain their newfound pricing power.
This means → if price hikes stick, profits will migrate up the supply chain; if demand disappoints, the pre-stocked materials turn into a cost burden instead.
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