Toyo-Korea Signs Contract for Pyeongtaek TMAH Production Facility, Strengthening Semiconductor Materials Supply BaseMar. 24, 2026
Toyo Engineering Korea Limited (President & CEO: Yoshinari Miyazaki, hereinafter “Toyo-Korea”) announced that it has signed the HTC-P Project contract with HANTOK Chemicals (President & CEO: Hyotaek Ahn) on March 24, 2026, for the construction of a Tetramethylammonium Hydroxide (TMAH) production facility, and has officially commenced the project.
This project involves the construction of a TMAH (Tetramethylammonium Hydroxide) production facility, a key material essential for semiconductor and display manufacturing processes. It is a strategic initiative aimed at responding to the growth of the global semiconductor market and strengthening the domestic supply base for critical materials.
Toyo-Korea will execute the Procurement and Construction (P&C) scope of the project and plans to ensure its stable delivery based on its accumulated engineering and construction expertise.
This contract demonstrates Toyo-Korea’s proven capabilities in the semiconductor materials plant sector and is expected to contribute to expanding its competitiveness and generating additional business opportunities in related fields.
Project Overview
- Client: HANTOK Chemicals
(A 50:50 joint venture between Lotte Chemical and Tokuyama Corporation of Japan) - Contractor: Toyo Engineering Korea Limited
- Location: Poseung (BIX) Industrial Complex, Pyeongtaek, Gyeonggi-do, Korea
- Facility: TMAH Production Facility
- Scope of Work: Procurement & Construction (P&C)
- Completion: September 2027
TMAH (Tetramethylammonium Hydroxide)
TMAH is a key developer chemical used in semiconductor photolithography processes and is an essential material for advanced semiconductor manufacturing requiring fine patterning technology.