# Who are SFA Semicon's customers? Who does SFA Semicon earn revenue from?
Canonical: https://valuechain.wiki/sfa-semicon · Facet: customers · Updated: 2026-07-12T06:24:41.582139+00:00 · Source: ValueChain.wiki (cited money-flow graph)

**Citable summary**: SFA Semicon's confirmed revenue counterparties include 삼성전자, SK하이닉스, Micron Technology. Per the valuechain.wiki graph: 3 revenue edges, backed by 4 dated sources, 1 of them primary filings (as of 2026-07-12).

### 에스에프에이 (최대주주 54.95%) (high)  → /sfa-engineering.md
- note: The axis binding SFA Semicon into the SFA group — display/semiconductor-equipment maker SFA Engineering is the largest shareholder at 54.95%. It links the parent's equipment and automation capability with the OSAT back-end inside the group, supporting capacity reallocation such as the Samsung-volume transfer to the Philippines.
- [confirms] DART (FSS) (KO, filing, published 2026-03-23) https://dart.fss.or.kr/dsaf001/main.do?rcpNo=20260323000826: "Largest shareholder SFA Engineering, 54.95% stake."

### 삼성전자 (high)  → /samsung-electronics.md
- note: Contract-assembles/tests Samsung memory — as out-of-fab back-end, Samsung's memory volume/utilization is the revenue, with the outsourcing share vs in-house the growth variable.
- [confirms] Daum News (KO, news, published 2026-06-17) https://v.daum.net/v/20260617203416105: "Provides memory back-end packaging and test to Samsung Electronics."
- [mentions] Korea Investment & BNK Securities (KO, research, published 2026-04-27) http://www.dailyinvest.kr/news/articleView.html?idxno=70446: "Analysts: Samsung commodity-memory back-end transfer to Philippines drives 2026 turnaround (Philippines revenue +49.7%); targets KRW 8,000-12,000 (Buy)."
- [mentions] DART (FSS) (KO, filing, published 2026-03-23) https://dart.fss.or.kr/dsaf001/main.do?rcpNo=20260323000826: "Sales channels: domestic memory to 'Samsung Electronics et al.' KRW 212.3bn (57.8%), exports KRW 86.0bn (23.4%). One external customer above 10% of revenue: KRW 264.9bn (anonymized)."
- [confirms] SFA Semicon (EN, ir, published 2025-05-01) https://www.sfas.co.kr/eng/: "Provides memory back-end packaging and test to Samsung Electronics."

### SK하이닉스 (mid)  → /sk-hynix.md
- note: Contract back-end for SK hynix memory — as HBM raises assembly/test difficulty, outsourced volume and pricing grow.
- [confirms] Daum News (KO, news, published 2026-06-17) https://v.daum.net/v/20260617203416105: "Provides memory back-end packaging and test to SK hynix."
- [confirms] DART (FSS) (KO, filing, published 2026-03-23) https://dart.fss.or.kr/dsaf001/main.do?rcpNo=20260323000826: "DART annual report: revenue, customers and business."
- [confirms] SFA Semicon (EN, ir, published 2025-05-01) https://www.sfas.co.kr/eng/: "Provides memory back-end packaging and test to SK hynix."

### Micron (mid)  → /micron.md
- note: The remaining pillar of the global memory-3 beyond Samsung and SK — the annual report names Samsung, Micron and SK hynix as key customers. US memory maker Micron's volume partly diversifies the concentration on the two domestic customers.
- [confirms] DART (FSS) (KO, filing, published 2026-03-23) https://dart.fss.or.kr/dsaf001/main.do?rcpNo=20260323000826: "Supplies packaging solutions to leading semiconductor firms including Samsung, Micron and SK hynix (annual report)."

Reverse side: https://valuechain.wiki/sfa-semicon/suppliers.md · Ripple: https://valuechain.wiki/sfa-semicon/ripple.md

---
Full node: https://valuechain.wiki/sfa-semicon.md · JSON: https://valuechain.wiki/sfa-semicon.json