Samsung Foundry Allocates Half of 4 nm Capacity for HBM4 Base Dies
Samsung Foundry, a unit of Samsung Electronics, is allocating half of its 4 nm (SF4) manufacturing capacity to produce HBM4 base dies, according to Korean media. The company is seeing increased demand for custom logic integration in these dies. Samsung's HBM market share rose to 38% in Q2 2026, up from 15% a year earlier, while SK hynix's share fell to 50%.
How this was made
The 30-second read
Why it matters
The move could accelerate Samsung's market‑share gains in HBM, while SK Hynix may lose share.
Market read
A material capacity shift in a major foundry that may influence HBM pricing and AI hardware supply chains.
What to watch
Potential supply‑chain constraints for 4 nm wafers and competition from emerging EUV fabs.
Background
Samsung Electronics' foundry division is expanding its advanced‑node capacity to meet growing HBM demand for AI accelerators.
Ticker impact
Samsung Foundry announced allocating half of its 4 nm capacity to HBM4 base die production, a new capacity commitment.
Potential upside for Samsung shares/ADRs over the next weeks as customers book capacity.
Large‑cap foundry capacity shift is material; market share data shows Samsung gaining ground.
Market effects
Strengthens the semiconductor foundry sector outlook, especially for advanced‑node HBM suppliers.
Boosts South Korean semiconductor export expectations.
May shift global HBM supply dynamics, benefiting AI and HPC customers.
Counterpoint
If demand for HBM4 stalls, the capacity allocation could lead to under‑utilized fab lines and margin pressure.
Key entities
- companySamsung Electronics
Parent of Samsung Foundry, a leading semiconductor manufacturer.
- companySK Hynix
Competing memory supplier losing HBM market share.
