en.Wedoany.com Reported - Handeok Chemical, a joint venture between Lotte Chemical Group and Japan's Tokuyama, has commenced construction of a production plant for tetramethylammonium hydroxide (TMAH), a developer used in semiconductor and display manufacturing, in Pyeongtaek, Gyeonggi Province. The project involves a total investment of 130 billion KRW (approximately $84.8 million) and covers an area of about 32,000 square meters. Production lines will be gradually added in line with customer capacity expansion plans, with commercial operations expected to begin in September 2027.

TMAH is a critical material used in the development process of semiconductor and display manufacturing, responsible for forming fine circuit patterns. Handeok Chemical was established in 1995, initially as a 50:50 joint venture between Lotte Fine Chemical and Japan's Tokuyama. Since 2020, its shareholders have been Lotte Chemical and Tokuyama, each holding a 50% stake. As the only producer of semiconductor developer in South Korea, Handeok Chemical, together with Lotte Fine Chemical, has achieved vertical integration from the basic raw material tetramethylammonium chloride (TMAC) to the finished TMAH product, and plans to increase its existing TMAH capacity by 50%.

Once the Pyeongtaek plant is operational, Handeok Chemical will establish a dual-base production layout in Ulsan and Pyeongtaek. Lee Young-joon, Chief Representative of Lotte Chemical Group, noted that this plant construction is a strategic investment to proactively address future demand. By dual-tracking production bases, the company can establish a stable supply system, thereby enhancing the stability of the supply chain for South Korea's semiconductor cluster.

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