Sumitomo Chemical
A diversified chemical group founded in 1913 whose electronics business supplies photoresists for ArF immersion and EUV lithography and high-purity process chemicals.
住友化学・Materials・Last updated: October 22, 2026
Overview
Sumitomo Chemical is headquartered in Chuo, Tokyo. Its semiconductor materials include photoresists and the polymers and photoacid generators that go into them, as well as high-purity chemicals.
Its Korean subsidiary Dongwoo Fine-Chem supplies chemicals and photoresists to chipmakers in South Korea.
Business: Photoresists and semiconductor process chemicals
Why it matters
Photoresists are one of the materials where Japanese suppliers hold most of the world market.
Semiconductor materials are a small part of a much larger chemical group, so Sumitomo Chemical is not in the semiconductor revenue ranking.
Main products
- •Photoresists for ArF immersion, KrF and EUV
- •Resist polymers and photoacid generators
- •High-purity process chemicals
Sites in Japan
Head officeHeadquarters
Chuo, Tokyo
Osaka WorksPlant
Osaka, Osaka
Ehime WorksPlant
Niihama, Ehime