Tokyo Ohka Kogyo completes new Koriyama building for advanced photoresists

admin — Thu, 08 Oct 2026 00:00:00 +0000

Tokyo Ohka Kogyo (TOK) has completed a new manufacturing building for semiconductor photoresists at its Koriyama Plant in Koriyama City, Fukushima Prefecture, with a building area of 4,800 square meters and an investment of approximately ¥23 billion. The building, which the company describes as one of the world's largest facilities of its kind, is scheduled to start operations in November 2026 and will produce EUV and ArF photoresists on automated, digitalized lines. The project is aimed at expanding supply capacity as the semiconductor market grows.

Why it matters

Added EUV and ArF photoresist capacity at a large single site could ease supply tightness for chipmakers and strengthens TOK's position against other advanced photoresist suppliers.

Key facts

Companies	Tokyo Ohka Kogyo Co., Ltd.
Chemicals	EUV photoresists, ArF photoresists
Investment	Approximately ¥23 billion
Location	Koriyama Plant, 1-23 Machiikedai, Koriyama City, Fukushima Prefecture
Timing	Construction began in July 2024, Completion: October 8, 2026, Scheduled start of operations: November 2026
End uses	Semiconductor manufacturing

Market context

Photoresists are light-sensitive polymer materials that are coated onto silicon wafers and patterned by exposure, forming the circuit features that define a chip. EUV (extreme ultraviolet) resists are used for the most advanced logic and memory nodes, while ArF (argon fluoride, 193 nm) resists serve a wide range of critical and mid-level layers. Demand is driven mainly by foundries and integrated device makers building leading-edge logic, DRAM and high-bandwidth memory, so it tracks capital spending on fabs. Qualifying a new photoresist takes long customer testing, which keeps the supplier base concentrated among a few Japanese and global producers. Large single-site capacity can shorten lead times and reduce supply risk for chipmakers, though it does not by itself change pricing, which is governed by long-term contracts and product qualification. Automated, digitalized lines also tend to improve consistency, an important factor for resists used at very fine geometries.

Source: official release on tok.co.jp. Summary and context written by Market Krystal.

The post Tokyo Ohka Kogyo completes new Koriyama building for advanced photoresists appeared first on Market Krystal.

Tokyo Ohka Kogyo Completes Pyeongtaek High-Purity Chemical Plant in South Korea

admin — Tue, 15 Sep 2026 00:00:00 +0000

Tokyo Ohka Kogyo has completed construction of the Pyeongtaek Plant in Gyeonggi Province, South Korea, at its consolidated subsidiary TOK Advanced Materials. Phase 1 includes a high-purity chemical manufacturing building with cleanroom areas for semiconductor production, plus warehouses, on roughly 6,300 square meters with an investment of about ¥12.0 billion. Operations are scheduled to start in the first half of 2027, making it the Group's second South Korean production site.

Why it matters

Adds local high-purity chemical supply for South Korean semiconductor customers, shortening supply chains and strengthening the company's position against competitors serving Korean chipmakers.

Key facts

Companies	Tokyo Ohka Kogyo Co., Ltd., TOK Advanced Materials Co., Ltd., TOK Group
Chemicals	photoresists, high-purity chemicals
Investment	Approximately ¥12.0 billion
Location	Pyeongtaek, Gyeonggi Province, South Korea
Timing	2012, September 15, 2026, First half of 2027, August 6, 2026
End uses	semiconductor manufacturing

Market context

Photoresists are light-sensitive polymer materials that are applied to silicon wafers and patterned by lithography, forming the masks that define circuit features during chip fabrication. High-purity process chemicals, such as cleaning solvents, developers and etchants, are used alongside them in wafer processing, where even trace contamination can reduce yields. Demand is driven mainly by semiconductor manufacturing, including memory and logic fabs, and by the advanced packaging and display supply chains that rely on similar materials. Local production close to large chipmaking customers generally shortens delivery lead times, reduces logistics exposure and allows suppliers to respond faster to qualification and process changes. For buyers, a regional supplier with dedicated cleanroom capacity can improve supply security, while for the market it adds capacity in a concentrated chemical segment where a small number of established suppliers compete on purity, consistency and technical support.

Source: official release on tok.co.jp. Summary and context written by Market Krystal.

The post Tokyo Ohka Kogyo Completes Pyeongtaek High-Purity Chemical Plant in South Korea appeared first on Market Krystal.

Tokyo Ohka Kogyo Archives | Market Krystal

Tokyo Ohka Kogyo completes new Koriyama building for advanced photoresists

Key facts

Market context

Tokyo Ohka Kogyo Completes Pyeongtaek High-Purity Chemical Plant in South Korea

Key facts

Market context