MTMaterial Transition · Public intelligence

Evidence-bound company brief · as of September 18, 2026

SK hynix Inc. KRX: 000660

Memory semiconductors, HBM, advanced packaging and materials-intensive fabs

SKH
Public materials brief.

SK hynix has disclosed the operating logic for a semiconductor water loop: wastewater is treated through ultrafiltration and reverse osmosis, then reused according to required water quality. That is a real process description, not a complete fab mass balance. The next decision is one site, water stream and destination, with recovery yield, energy use, quality standard and wafer-production link documented together.

SK hynix's 2025 Sustainability Report is presented as a company report covering its sustainability performance and HBM-led technology position. Public company materials identify semiconductor manufacturing, water, waste, climate and supply-chain management as material operating topics. The public record reviewed here does not establish one fab-level mass balance for ultrapure water, process chemistry, wafer scrap, HBM packaging and recovered inputs, so the first engagement remains a qualification exercise.

2025Sustainability report cycle
HBMHigh-bandwidth memory growth lane
DRAM and NANDCore memory platforms
EvidenceFab and package loop needs qualification

Material inputs to resolve

  • Silicon wafers, photoresists, specialty gases, solvents, acids, bases, metals, substrates and mold compounds
  • Ultrapure water, electricity, cleanroom consumables and packaging inputs
  • Recovered water, chemicals, wafer scrap and packaging materials where qualified

Outputs and residuals to resolve

  • DRAM, NAND, HBM and advanced memory packages
  • Wastewater, spent chemicals, wafer scrap, gases, substrates and molding waste
  • Fab-level recovery yield, package allocation and supplier evidence remain open
First decision: Choose one SK hynix fab and one HBM or memory package family. Map inputs, process yield, water, chemistry, substrate, scrap, recovery and output quality in one evidence chain.

Control

SK hynix develops and manufactures memory products including DRAM, NAND and HBM.

Growth context

The company's 2025 sustainability disclosure highlights HBM and the AI-era memory market.

Material system

The relevant physical system includes water treatment and reuse, wafer fabrication, advanced packaging, test, substrates, molding and logistics.

Evidence boundary

The public report establishes the operating surface. It does not replace a fab and package mass balance.

Decision boundary

SK hynix has disclosed the operating logic for a semiconductor water loop: wastewater is treated through ultrafiltration and reverse osmosis, then reused according to required water quality. That is a real process description, not a complete fab mass balance. The next decision is one site, water stream and destination, with recovery yield, energy use, quality standard and wafer-production link documented together. The public record supports one bounded next move: Choose one SK hynix fab and one HBM or memory package family. Map inputs, process yield, water, chemistry, substrate, scrap, recovery and output quality in one evidence chain. It does not establish a buyer, commercial approval or supply agreement.