# Who does SK hynix pay? Who are its key suppliers?
Canonical: https://valuechain.wiki/sk-hynix · Facet: suppliers · Updated: 2026-09-04T23:10:42.778192+00:00 · Source: ValueChain.wiki (cited money-flow graph)

**Citable summary**: SK hynix's confirmed suppliers/cost counterparties include 한미반도체, ASMPT, 리노공업 plus 55 undisclosed/aggregate relationships. Per the valuechain.wiki graph: 58 cost edges, backed by 89 dated sources, 13 of them primary filings (as of 2026-09-04).

### 한미반도체 (high)  → /hanmi-semiconductor.md
- metric: Contract value ₩44.2B · 2026-06-08 · Single-supply contract (latest)
- note: HBM TC bonder. Four single-supply contracts in the past year (₩42.8B→₩1.6B→₩9.7B→₩44.2B), up to 7.66% of Hanmi's revenue.
- [confirms] DART (FSS Electronic Disclosure) (KO, filing, published 2026-06-08) https://dart.fss.or.kr/dsaf001/main.do?rcpNo=20260608800436: "Counterparty SK hynix, contract value ₩44,200,000,000, 7.66% of Hanmi's recent revenue, starting 2026-06-08."
- [confirms] DART (FSS Electronic Disclosure) (KO, filing, published 2026-01-14) https://dart.fss.or.kr/dsaf001/main.do?rcpNo=20260114800028: "Counterparty SK hynix, contract value ₩9,650,000,000, 1.73% of Hanmi's recent revenue, starting 2026-01-14."
- [confirms] DART (FSS Electronic Disclosure) (KO, filing, published 2025-11-14) https://dart.fss.or.kr/dsaf001/main.do?rcpNo=20251117800179: "Counterparty SK hynix, contract value ₩1,567,500,000, 0.28% of Hanmi's recent revenue, starting 2025-11-14."
- [confirms] DART (FSS Electronic Disclosure) (KO, filing, published 2025-05-16) https://dart.fss.or.kr/dsaf001/main.do?rcpNo=20250516800319: "Counterparty SK hynix, contract value ₩42,812,000,000, 7.66% of Hanmi's recent revenue, starting 2025-05-16."
- [confirms] The Elec (EN, news, accessed 2026-06-19) https://www.thelec.net/news/articleView.html?idxno=11132: "Hanmi Semiconductor signed a TC bonder (Griffin) supply contract with SK hynix for HBM4."

### ASMPT (high)  → /asmpt.md
- metric: Supply share ~50% · 2026
- note: HBM4 TC bonder. About half of current orders.
- [confirms] TrendForce (EN, news, published 2025-12-12) https://www.trendforce.com/news/2025/12/12/news-sk-hynix-reportedly-places-hbm4-tc-bonder-order-with-asmpt-as-hanmi-hanwha-patent-clash-heats-up/: "ASMPT supplies about half of SK hynix's roughly 50 HBM4 TC bonders."

### 리노공업 (high)  → /leeno.md
- note: Purchases test sockets and pins from Leeno Industrial.
- [confirms] Leeno (EN, ir, published 2025-05-01) https://www.leeno.com: "Buys test sockets and pins from Leeno Industrial."
- [confirms] Komachine (KO, analysis, published 2025-01-01) https://www.komachine.com/ko/companies/leeno: "Buys test sockets and pins from Leeno Industrial."

### 유진테크 (high)  → /eugene-tech.md
- note: Purchases ALD deposition equipment from Eugene Technology.
- [confirms] Eugene Technology (EN, ir, published 2025-05-01) https://www.eugenetech.co.kr: "Buys ALD deposition equipment from Eugene Technology."
- [confirms] TheElec (KO, news, published 2025-01-01) https://www.thelec.kr/news/articleView.html?idxno=11728: "Buys ALD deposition equipment from Eugene Technology."

### 심텍 (high)  → /simmtech.md
- note: Purchases memory package substrates from Simmtech.
- [confirms] Simmtech (EN, ir, published 2025-05-01) https://www.simmtech.com: "Buys memory package substrates from Simmtech."
- [confirms] TheElec (KO, news, published 2025-01-01) https://www.thelec.kr/news/articleView.html?idxno=18777: "Buys memory package substrates from Simmtech."

### ASML (high)  → /asml.md
- note: Buys EUV lithography from ASML (a major customer). 2026 capex up sharply: ramping the M15X fab (about KRW 19tn, advanced DRAM/HBM), pulling Yongin cluster phase-1 completion forward from May to February and prioritizing EUV and other key tools.
- [confirms] NineScrolls (EN, news, published 2026-04-24) https://ninescrolls.com/news/sk-hynix-q1-2026-record-52-6-trillion-won-revenue-72-operating-margin-m15x-fab: "SK hynix broke ground on the KRW 19tn M15X fab for advanced DRAM/HBM and is raising 2026 capex to secure EUV and other advanced tools."
- [confirms] TheElec (KO, news, published 2026-04-24) https://www.thelec.kr/news/articleView.html?idxno=55559: "Pulling Yongin cluster phase-1 completion forward from May to February, concentrating investment on M15X ramp-up and key tools such as EUV."
- [confirms] Seoul Economic Daily (EN, news, published 2026-04-17) https://en.sedaily.com/finance/2026/04/17/samsung-sk-secure-two-thirds-of-asmls-annual-euv-shipments: "Samsung and SK secured two-thirds of ASML's 2025 EUV shipments."

### 아이에스시 (high)  → /isc.md
- note: Purchases test sockets from ISC.
- [confirms] ISC (EN, ir, published 2025-05-01) https://www.isc21.co.kr: "Buys test sockets from ISC."
- [confirms] Namu (KO, reference, published 2025-01-01) https://namu.wiki/w/ISC(기업): "Buys test sockets from ISC."

### Onto Innovation (high)  → /onto-innovation.md
- note: Buys metrology and inspection tools from Onto Innovation.
- [confirms] TheElec (KO, news, published 2025-09-01) https://www.thelec.kr/news/articleView.html?idxno=38886: "Buys metrology and inspection tools from Onto Innovation."
- [confirms] SEC EDGAR (EN, filing, published 2025-02-06) https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=ONTO&type=10-K: "Buys metrology and inspection tools from Onto Innovation."

### ASM International (high)  → /asm-international.md
- note: Buys ALD deposition equipment from ASM International.
- [confirms] ASM (EN, ir, published 2025-05-01) https://www.asm.com/investors: "Buys ALD deposition equipment from ASM International."
- [confirms] TheElec (KO, news, published 2025-01-01) https://www.thelec.kr/news/articleView.html?idxno=32760: "Buys ALD deposition equipment from ASM International."

### SCREEN Holdings (high)  → /screen-holdings.md
- note: Buys cleaning and track equipment from SCREEN Holdings.
- [confirms] SCREEN (EN, ir, published 2025-05-01) https://www.screen.co.jp/ir: "Buys cleaning and track equipment from SCREEN Holdings."
- [confirms] Komachine (KO, analysis, published 2025-01-01) https://www.komachine.com/ko/companies/screen-semiconductor-solutions: "Buys cleaning and track equipment from SCREEN Holdings."

### Tokyo Ohka Kogyo (high)  → /tokyo-ohka.md
- note: Buys EUV photoresist from Tokyo Ohka Kogyo.
- [confirms] JK Daily (KO, news, published 2025-06-01) https://www.jk-daily.co.kr/news/articleView.html?idxno=34917: "Buys EUV photoresist from Tokyo Ohka Kogyo."
- [confirms] TOK (EN, ir, published 2025-05-01) https://www.tok.co.jp/eng/ir: "Buys EUV photoresist from Tokyo Ohka Kogyo."

### Camtek (high)  → /camtek.md
- note: Buys inspection and metrology tools from Camtek.
- [confirms] SEC EDGAR (EN, filing, published 2025-03-01) https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=CAMT&type=20-F: "Buys inspection and metrology tools from Camtek."
- [confirms] TheElec (KO, news, published 2025-01-01) https://www.thelec.kr/news/articleView.html?idxno=31137: "Buys inspection and metrology tools from Camtek."

### 유니테스트 (high)  → /unitest.md
- note: Purchases HBM burn-in and wafer testers from Unitest.
- [confirms] Pinpoint News (KO, news, published 2026-01-01) https://www.pinpointnews.co.kr/news/articleView.html?idxno=389615: "Buys HBM burn-in and wafer testers from Uni Test."
- [confirms] Green Economy (KO, news, published 2026-01-01) https://www.greened.kr/news/articleView.html?idxno=322441: "Buys HBM burn-in and wafer testers from Uni Test."

### Ebara (high)  → /ebara.md
- note: Sources CMP/vacuum pumps from Ebara.
- [confirms] Namuwiki (KO, research, published 2026-01-01) https://namu.wiki/w/에바라 제작소: "Sources CMP/vacuum pumps from Ebara."
- [confirms] SemiconductorX (EN, research, published 2025-06-01) https://semiconductorx.com/wfe-cmp.php: "Sources CMP/vacuum pumps from Ebara."

### 솔브레인 (high)  → /soulbrain.md
- note: Buys high-purity HF and etchants from Soulbrain (HBM/3D NAND).
- [confirms] Komachine (EN, reference, accessed 2026-06-20) https://www.komachine.com/en/companies/soulbrain: "SK hynix adopted Soulbrain high-purity HF."

### 이엔에프테크놀로지 (high)  → /enf-technology.md
- note: Buys localized HF, BOE and etchant from ENF (NAND/HBM).
- [confirms] TheElec (KO, news, accessed 2026-06-20) https://www.thelec.kr/news/articleView.html?idxno=58083: "SK hynix first adopted ENF’s localized HF."

### 원익IPS (high)  → /wonik-ips.md
- note: Buys wafer-fab deposition tools from Wonik IPS.
- [confirms] Seoul Economic Daily (EN, news, published 2026-06-11) https://en.sedaily.com/finance/2026/06/11/semiconductor-equipment-stocks-surge-jusung-up-24-percent: "SK capex expands Wonik IPS tool demand."

### 주성엔지니어링 (high)  → /jusung-engineering.md
- note: Buys all next-gen high-k DRAM ALD tools from Jusung Engineering.
- [confirms] TheElec (KO, news, published 2021-04-19) https://www.thelec.kr/news/articleView.html?idxno=11987: "SK hynix adopts all Jusung ALD tools."

### 후성 (high)  → /foosung.md
- note: Buys C4F6/WF6 specialty gases from Foosung (WF6 surges with 3D NAND).
- [confirms] HuffPost Korea (KO, news, accessed 2026-06-20) https://www.huffingtonpost.kr/article/239927: "SK hynix is a Foosung specialty-gas customer."

### HPSP (high)  → /hpsp.md
- note: Buys high-pressure hydrogen annealing tools from HPSP (sole supplier).
- [confirms] Korea Economic Daily (KO, news, published 2025-07-13) https://www.hankyung.com/article/2025071351421: "SK hynix adopts HPSP high-pressure annealing tools."

### 피에스케이 (high)  → /psk-inc.md
- note: Buys dry-strip tools from PSK (HBM/DDR5).
- [confirms] TheElec (KO, news, accessed 2026-06-21) https://www.thelec.kr/news/articleView.html?idxno=37929: "SK hynix adopts PSK tools."

### 도쿄일렉트론 (high)  → /tokyo-electron.md
- note: Buys coater, etch, deposition and clean tools from Tokyo Electron.
- [confirms] Sisa Journal e (KO, news, accessed 2026-06-21) https://www.sisajournal-e.com/news/articleView.html?idxno=406466: "SK hynix adopts TEL wafer-fab tools."

### 신에쓰화학 (high)  → /shin-etsu.md
- note: Buys 300mm silicon wafers from Shin-Etsu Chemical under LTA.
- [confirms] ICN Magazine (KO, news, published 2026-01-15) https://icnweb.kr/2026/79720/: "SK hynix depends on Shin-Etsu Chemical for wafer supply."

### SK실트론 (high)  → /sk-siltron.md
- note: Buys 300mm and HBM4 wafers from affiliate SK Siltron.
- [confirms] ICN Magazine (KO, news, published 2026-01-15) https://icnweb.kr/2026/79720/: "SK hynix secures HBM4 wafers early with SK Siltron."

### Advantest (high)  → /advantest.md
- note: Buys test equipment (ATE) from Advantest.
- [confirms] AlphaBiz (KO, news, published 2025-09-01) https://alphabiz.co.kr/news/view/1065571888915355: "Dominant HBM tester tech; SK hynix and others."
- [confirms] Advantest (EN, ir, published 2025-06-01) https://www.advantest.com/document/en/investors/ir-library/annual/E_02_IAR2025.pdf: "Annual report: ATE revenue and customers."
- [confirms] Mordor (EN, analysis, published 2025-01-01) https://www.mordorintelligence.com/industry-reports/semiconductor-test-equipment-market: "No.1 in test equipment at ~58%."

### Teradyne (high)  → /teradyne.md
- note: Buys test equipment (ATE) from Teradyne.
- [confirms] Korea Economic Daily (KO, news, published 2026-02-24) https://www.hankyung.com/article/2026022418631: "Teradyne surges on the chip upturn."
- [confirms] SEC EDGAR (EN, filing, published 2025-02-26) https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=TER&type=10-K: "10-K: semiconductor-test revenue."
- [confirms] Teradyne (EN, ir, published 2025-01-01) https://www.teradyne.com/semiconductor-testing/: "Memory, SoC and computing test."

### 섬코 (high)  → /sumco.md
- note: Buys 300mm silicon wafers from SUMCO Corporation under LTA.
- [confirms] ICN Magazine (KO, news, published 2026-01-15) https://icnweb.kr/2026/79720/: "SK hynix depends on SUMCO Corporation for wafer supply."

### Kokusai Electric (high)  → /kokusai-electric.md
- note: Sources batch ALD/CVD from Kokusai.
- [confirms] TheElec/Daum (KO, news, published 2025-01-01) https://v.daum.net/v/3edKEYlopo: "Sources batch ALD/CVD from Kokusai."
- [confirms] SemiAnalysis (EN, research, published 2023-10-15) https://newsletter.semianalysis.com/p/going-vertical-gate-all-around-3d: "Sources batch ALD/CVD from Kokusai."

### FormFactor (high)  → /formfactor.md
- note: Sources HBM/DRAM probe cards from FormFactor.
- [confirms] SEC EDGAR (EN, filing, published 2025-10-29) https://www.sec.gov/Archives/edgar/data/0001039399/000103939925000113/form-20250927.htm: "Sources HBM/DRAM probe cards from FormFactor."
- [confirms] ETNews (KO, news, published 2024-04-24) https://www.etnews.com/20240424000216: "Sources HBM/DRAM probe cards from FormFactor."

### Air Liquide (high)  → /air-liquide.md
- note: Sources UHP/specialty gases from Air Liquide.
- [confirms] Air Liquide (EN, filing, published 2025-10-28) https://www.airliquide.com/sites/airliquide.com/files/2025-11/air-liquide-pr-25-q3-air-liquide-continues-to-combine-sales-growth-with-commercial-successes-to-shape-the-future.pdf: "Sources UHP/specialty gases from Air Liquide."
- [confirms] e4ds news (KO, news, published 2024-01-01) https://www.e4ds.com/sub_view.asp?ch=5&t=0&idx=16375: "Sources UHP/specialty gases from Air Liquide."

### Merck KGaA (high)  → /merck-kgaa.md
- note: Sources thin-film/CMP/gas materials from Merck KGaA.
- [confirms] Merck KGaA (EN, filing, published 2026-03-06) https://www.reports.emdgroup.com/en/annualreport/2025/management-report/fundamental-information-about-the-group/company-profile-and-structure/electronics.html: "Sources thin-film/CMP/gas materials from Merck KGaA."

### ACM Research (high)  → /acm-research.md
- note: Sources wafer-cleaning tools from ACM Research.
- [confirms] SemiAnalysis (EN, research, published 2026-01-01) https://newsletter.semianalysis.com/p/acm-research-chinas-most-successful: "Sources wafer-cleaning tools from ACM Research."

### 한화세미텍 (mid)  → /hanwha-semitech.md
- note: Entering TC bonder supply.
- [mentions] TrendForce (EN, news, published 2025-12-12) https://www.trendforce.com/news/2025/12/12/news-sk-hynix-reportedly-places-hbm4-tc-bonder-order-with-asmpt-as-hanmi-hanwha-patent-clash-heats-up/: "Hanwha Semitech entered the TC bonder supply chain this year."

### BESI (mid)  → /besi.md
- note: Expanding bonder share.
- [mentions] TrendForce (EN, news, published 2025-12-12) https://www.trendforce.com/news/2025/12/12/news-sk-hynix-reportedly-places-hbm4-tc-bonder-order-with-asmpt-as-hanmi-hanwha-patent-clash-heats-up/: "BESI and ASMPT are gaining share from Korean suppliers."

### 대덕전자 (mid)  → /daeduck.md
- note: Purchases FC-BGA package substrates from Daeduck Electronics.
- [confirms] TheElec (KO, news, published 2026-02-01) https://www.thelec.kr/news/articleView.html?idxno=56922: "Buys FC-BGA package substrates from Daeduck Electronics."
- [confirms] Daeduck (EN, ir, published 2025-05-01) https://www.daeduck.com: "Buys FC-BGA package substrates from Daeduck Electronics."

### 하나머티리얼즈 (mid)  → /hana-materials.md
- note: Purchases silicon and SiC etch parts from Hana Materials.
- [confirms] Hana Materials (EN, ir, published 2025-05-01) https://www.hanamt.com: "Buys silicon and SiC etch parts from Hana Materials."
- [confirms] ETNews (KO, news, published 2024-09-25) https://m.etnews.com/20200925000090: "Buys silicon and SiC etch parts from Hana Materials."

### 케이씨텍 (mid)  → /kc-tech.md
- note: Purchases CMP slurry and equipment from KCTech.
- [confirms] StockStalker (KO, news, published 2025-06-01) https://stockstalker.co.kr/semiconductor-equipment/: "Buys CMP slurry and tools from KC Tech."
- [confirms] KC Tech (EN, ir, published 2025-05-01) https://www.kctech.com: "Buys CMP slurry and tools from KC Tech."

### 에스앤에스텍 (mid)  → /sns-tech.md
- note: Purchases blank masks and pellicles from S&S Tech.
- [confirms] ETNews (KO, news, published 2026-01-12) https://www.etnews.com/20260112000180: "Buys blankmask and pellicle from S&S Tech."
- [confirms] Financial News (KO, news, published 2025-03-21) https://www.fnnews.com/news/202503211358486799: "Buys blankmask and pellicle from S&S Tech."

### 네패스 (mid)  → /nepes.md
- note: Purchases back-end packaging from Nepes.
- [confirms] Nepes (EN, ir, published 2025-05-01) https://www.nepes.co.kr: "Buys advanced packaging from Nepes."
- [confirms] THE VC (KO, analysis, published 2025-01-01) https://thevc.kr/nepes: "Buys advanced packaging from Nepes."

### 디스코 (mid)  → /disco.md
- note: Purchases dicing and grinding equipment from Disco.
- [confirms] Disco (EN, ir, published 2025-05-01) https://www.disco.co.jp/eg/ir/: "Buys dicing and grinding equipment from Disco Corporation."
- [confirms] SemiAnalysis (EN, analysis, published 2025-01-01) https://newsletter.semianalysis.com/p/disco-corporation-the-world-leader: "Buys dicing and grinding equipment from Disco Corporation."

### 히타치 하이테크 (mid)  → /hitachi-hightech.md
- note: Purchases etch and metrology equipment from Hitachi High-Tech.
- [confirms] Hitachi High-Tech (EN, ir, published 2025-05-01) https://www.hitachi-hightech.com/global/en/company/financial-info/: "Buys etch and metrology equipment from Hitachi High-Tech."
- [confirms] Hitachi (EN, news, published 2024-11-27) https://www.hitachi.com/New/cnews/month/2024/11/241127a.html: "Buys etch and metrology equipment from Hitachi High-Tech."

### 파크시스템스 (mid)  → /park-systems.md
- note: Purchases AFM metrology equipment from Park Systems.
- [confirms] Sisa Journal e (KO, news, published 2026-01-01) https://www.sisajournal-e.com/news/articleView.html?idxno=414681: "Buys AFM metrology tools from Park Systems."
- [confirms] Park Systems (EN, ir, published 2025-05-01) https://www.parksystems.com/ko/company/ir: "Buys AFM metrology tools from Park Systems."

### 어플라이드 머티어리얼즈 (mid)  → /applied-materials.md
- note: Buys Applied Materials wafer-fab tools (memory/HBM).
- [mentions] Asia Business Daily (KO, news, published 2026-04-28) https://www.asiae.co.kr/article/2026042808535291137: "SK hynix HBM capex drives tool demand."

### KLA (mid)  → /kla.md
- note: Buys KLA memory inspection/metrology tools.
- [confirms] KIPOST (KO, news, accessed 2026-06-20) https://www.kipost.net/news/articleView.html?idxno=201410: "KLA supplies SK hynix with inspection tools."

### 램리서치 (mid)  → /lam-research.md
- note: Buys Lam Research memory etch/deposition tools.
- [mentions] Asia Business Daily (KO, news, published 2026-04-28) https://www.asiae.co.kr/article/2026042808535291137: "SK hynix memory capex."

### 원익QnC (mid)  → /wonik-qnc.md
- note: Purchases quartz and ceramic parts from Wonik QnC.
- [confirms] Daum Research (KO, analysis, published 2025-01-01) https://m.cafe.daum.net/taejastory/UpJ3/14352: "Buys quartz and ceramic parts from Wonik QnC."
- [confirms] ZDNet Korea (KO, news, published 2020-04-22) https://zdnet.co.kr/view/?no=20200422101530: "Buys quartz and ceramic parts from Wonik QnC."

### 동진쎄미켐 (mid)  → /dongjin-semichem.md
- note: Buys materials such as HBM CMP slurry from Dongjin Semichem.
- [confirms] DART (Korea FSS) (KO, filing, published 2026-03-20) https://dart.fss.or.kr/dsae001/selectPopup.do?selectKey=00118804: "New CMP slurry supply for SK hynix HBM."

### Global Unichip (mid)  → /global-unichip.md
- note: Outsources ASIC design (e.g., NAND controllers) to GUC.
- [confirms] KIPOST (KO, news, published 2024-01-01) https://www.kipost.net/news/articleView.html?idxno=204840: "Outsources ASIC design (e.g., NAND controllers) to GUC."

### GlobalWafers (mid)  → /globalwafers.md
- note: Uses/buys 300mm silicon wafers from GlobalWafers.
- [confirms] GlobalWafers (EN, ir, published 2025-03-01) https://www.globalwafers.com/en/investors: "IR: silicon-wafer revenue and customers."
- [confirms] Mordor Intelligence (EN, analysis, published 2025-01-01) https://www.mordorintelligence.com/industry-reports/semiconductor-silicon-wafer-market: "Top-five 300mm oligopoly; GlobalWafers ~15%."
- [confirms] TheElec (KO, news, published 2024-06-01) https://www.thelec.kr/news/articleView.html?idxno=9435: "Supplies wafers to TSMC, UMC, Samsung."

### SFA반도체 (mid)  → /sfa-semicon.md
- note: Uses memory back-end packaging and test from SFA Semiconductor.
- [confirms] Daum News (KO, news, published 2026-06-17) https://v.daum.net/v/20260617203416105: "Uses memory back-end packaging and test from SFA Semicon."
- [confirms] SFA Semicon (EN, ir, published 2025-05-01) https://www.sfas.co.kr/eng/: "Uses memory back-end packaging and test from SFA Semicon."

### 파워텍 (PTI) (mid)  → /powertech.md
- note: Uses memory packaging and test from Powertech (PTI).
- [confirms] TrendForce (EN, analysis, published 2025-05-13) https://www.trendforce.com/presscenter/news/20250513-12577.html: "Uses memory packaging and test from Powertech Technology (PTI)."
- [confirms] PTI (EN, ir, published 2025-05-01) https://www.pti.com.tw/en/: "Uses memory packaging and test from Powertech Technology (PTI)."

### 하나마이크론 (mid)  → /hana-micron.md
- note: Uses back-end packaging and test from Hana Micron.
- [confirms] Daum News (KO, news, published 2026-06-17) https://v.daum.net/v/20260617203416105: "Uses back-end packaging and test from Hana Micron."
- [confirms] Hana Micron (EN, ir, published 2025-05-01) https://www.hanamicron.co.kr/eng/: "Uses back-end packaging and test from Hana Micron."

### Linde (mid)  → /linde.md
- note: Sources industrial/specialty gases from Linde.
- [confirms] SEC EDGAR (EN, filing, published 2025-10-30) https://www.sec.gov/Archives/edgar/data/1707925/000162828025047710/lin-20250930.htm: "Sources industrial/specialty gases from Linde."
- [confirms] Pressian (KO, news, published 2023-01-03) https://www.pressian.com/pages/articles/2023010315545594954: "Sources industrial/specialty gases from Linde."

### Fujimi (mid)  → /fujimi.md
- note: CMP slurry to SK hynix.
- [confirms] Hana Micron (EN, ir, published 2025-05-01) https://www.hanamicron.co.kr/eng/: "CMP slurry to SK hynix."

### Montage Technology (mid)  → /montage.md
- note: RCD for SK hynix DDR5 modules.
- [confirms] Hana Micron (EN, ir, published 2025-05-01) https://www.hanamicron.co.kr/eng/: "RCD for SK hynix DDR5 modules."

### 이오테크닉스 (그루빙) (mid)  → /eo-technics.md
- note: Femtosecond grooving equipment supplier (expected from 2026).
- [mentions] Daum News (KO, news, published 2025-11-18) https://v.daum.net/v/20251118143613858: "Expected to supply SK hynix with femtosecond grooving tools."

### 이오테크닉스 (mid)  → /eo-technics.md
- note: SK Hynix adopts EO Technics femtosecond laser grooving and full-cut tools for HBM4 and high-layer NAND back-end.
- [mentions] TweakTown (EN, news, published 2025-06-01) https://www.tweaktown.com/news/106319/sk-hynix-to-change-wafer-cutting-for-hbm4-memory-and-400-layer-nand-flash-pushing-new-limits/index.html: "SK hynix is set to switch to femtosecond laser grooving and full-cut for HBM4 and 400-layer NAND."

### 스미토모화학 (반도체 소재·레지스트) (mid)  → /sumitomo-chemical.md
- note: Sources EUV/ArF photoresists and back-end materials for advanced packaging from Sumitomo Chemical (inferred).
- [confirms] Sumitomo Chemical (EN, filing, published 2025-09-30) https://www.sumitomo-chem.co.jp/english/ir/library/annual_report/files/docs/scr2025e_18.pdf: "South Korea (Iksan): supply site for Korean customers."

Reverse side: https://valuechain.wiki/sk-hynix/customers.md · Ripple: https://valuechain.wiki/sk-hynix/ripple.md

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Full node: https://valuechain.wiki/sk-hynix.md · JSON: https://valuechain.wiki/sk-hynix.json