# Who are ISC's customers? Who does ISC earn revenue from?
Canonical: https://valuechain.wiki/isc · Facet: customers · Updated: 2026-07-12T05:24:13.008+00:00 · Source: ValueChain.wiki (cited money-flow graph)

**Citable summary**: ISC's confirmed revenue counterparties include SK하이닉스, 삼성전자. Per the valuechain.wiki graph: 2 revenue edges, backed by 3 dated sources, 1 of them primary filings (as of 2026-07-12).

### SK하이닉스 (high)  → /sk-hynix.md
- note: Supplies silicone-rubber test sockets to SK hynix — rising HBM/memory test volume flows directly into consumables-replacement demand.
- [confirms] DART (FSS) (KO, filing, published 2026-03-18) https://dart.fss.or.kr/dsaf001/main.do?rcpNo=20260318000018: "DART annual report: revenue, customers and business."
- [confirms] ISC (EN, ir, published 2025-05-01) https://www.isc21.co.kr: "Supplies test sockets to SK hynix."
- [confirms] Namu (KO, reference, published 2025-01-01) https://namu.wiki/w/ISC(기업): "Supplies test sockets to SK hynix."

### 삼성전자 (high)  → /samsung-electronics.md
- note: Supplies silicone-rubber test sockets to Samsung — a core consumables customer in memory and logic test.
- [confirms] ISC (EN, ir, published 2025-05-01) https://www.isc21.co.kr: "Supplies test sockets to Samsung Electronics."
- [confirms] Namu (KO, reference, published 2025-01-01) https://namu.wiki/w/ISC(기업): "Supplies test sockets to Samsung Electronics."

Reverse side: https://valuechain.wiki/isc/suppliers.md · Ripple: https://valuechain.wiki/isc/ripple.md

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Full node: https://valuechain.wiki/isc.md · JSON: https://valuechain.wiki/isc.json