Tariff Notices · Import Enforcement · confirmed
USITC opens Section 337 on 3D NAND and HBM DRAM — KIOXIA and SK hynix named
Updated · Impact score 80/100 · Confidence 91%
The USITC instituted Investigation No. 337-TA-1506 on June 15, 2026, targeting 3D NAND and HBM DRAM memory chips and products containing them. Texas-based MonolithIC 3D filed the complaint against KIOXIA (Japan and Taiwan) and SK hynix (South Korea), alleging infringement of five U.S. patents.
Why it matters
KIOXIA and SK hynix together supply a significant share of global 3D NAND flash and DRAM. If the ITC issues exclusion orders, imports of NAND flash, DRAM modules, SSDs, and any products containing those chips from either company would be blocked at U.S. ports — affecting electronics manufacturers, data-center operators, and component distributors.
What to check next
Identify whether your supply chain sources 3D NAND flash, HBM DRAM, SSDs, or DRAM modules from KIOXIA or SK hynix. Monitor the ITC EDIS docket (Investigation No. 337-TA-1506) for the procedural schedule and respondent responses. Consult trade counsel if you import affected products from either manufacturer.
Affected entities
- Japan -> US
- South Korea -> US
- Taiwan -> US
- NAND / DRAM memory chips
- Semiconductors / Electronics
- KIOXIA
- SK hynix
- USITC