SUMCO → United Microelectronics (UMC)
As of 2026-09-05, SUMCO is a tracked supplier of United Microelectronics (UMC). SUMCO is a major in Materials (headquartered in Japan); United Microelectronics (UMC) is a major in Foundry (headquartered in Taiwan). SUMCO has 8 tracked customers; United Microelectronics (UMC) has 24 tracked suppliers.
Data as of 2026-09-05 · relationship type: tracked supplier → customer · both names resolve in companies.json · no dollar amount is shown unless it already sits on a company record, and none is invented here
Why this edge matters
SUMCO (major in Materials) is a tracked supplier of United Microelectronics (UMC) (major in Foundry). Second-largest silicon wafer producer, supplying all leading fabs. Taiwan's second foundry, strong in mature and specialty nodes. The edge is one of 24 tracked suppliers of United Microelectronics (UMC) and one of 8 tracked customers of SUMCO.
Source: derived from both company records and the counted edges.
The two companies
SUMCO (supplier)
Second-largest silicon wafer producer, supplying all leading fabs.
United Microelectronics (UMC) (customer)
Taiwan's second foundry, strong in mature and specialty nodes.
Other tracked suppliers of United Microelectronics (UMC)
Other tracked customers of SUMCO
Cite as: wafergraph, “SUMCO → United Microelectronics (UMC) — supplier relationship in the semiconductor supply chain”, https://wafergraph.com/relationship/sumco/umc/ (data as of 2026-09-05).
Track the chain
What moved in the semiconductor supply chain — This Week in the Chain, the free weekly wafergraph briefing.
Subscribe to the free weekly briefing →
Free · no login · 615 companies, updated weekly