South Korea's Dowooinsys Vina, a subsidiary of NP Group, has begun construction of its second manufacturing plant in Thai Nguyen province, expanding production capacity for ultra-thin glass (UTG) used in Samsung Display's foldable smartphone panels.
The new facility, located in Song Cong II Industrial Park, represents an investment of $130 million and is expected to increase the company's total production capacity in Vietnam to a maximum 3 million UTG units per month once fully equipped.
The groundbreaking ceremony was held on Wednesday, following the commissioning of Dowooinsys Vina's first plant. According to Thai Nguyen authorities, the company's initial investment phase was $120 million, bringing the combined investment for the two phases to $250 million.
Tran Van Hau, Vice Chairman of the Thai Nguyen People's Committee, said the company had disbursed about $90 million by the time construction of the second plant began.
Dowooinsys Vina to boost ultra-thin glass capacity to 3 million units a month
UTG is a key protective material used in foldable display panels. Thai Nguyen authorities said the company currently supplies 100% of its UTG output to Samsung Display, making it part of the South Korean electronics giant's global supply chain.
According to Dowooinsys, the second factory is designed to add production capacity of up to 2 million UTG units per month. Combined with the existing plant's capacity of 1 million units, the company's total monthly output in Thai Nguyen could reach 3 million units after all production equipment is installed.
The new facility will be built on a site covering approximately 25,300 square meters, with nearly 17,600 sqm of floor space. During the first construction phase, the company plans to complete the factory building, clean rooms, utility systems, electrical infrastructure and fire protection systems by January 2027.
Construction costs for the initial phase are estimated at 26 billion won (about $17.3 million). Dowooinsys said the construction will be financed through the Vietnamese subsidiary's existing funds without financial support from its parent company or external borrowing, while production equipment will be installed in line with market demand.
CEO Ok Kyung-seok said the second plant represents a strategic investment to prepare for continued growth in the global UTG market. He said the company would continue expanding into new markets while strengthening research and development to reinforce its leadership position in the industry.

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Dowooinsys was established in South Korea on March 25, 2010, and specializes in the research, manufacturing and sale of ultra-thin glass.
According to the company's listing prospectus filed with the Korea Exchange, New Power Plasma was Dowooinsys's largest shareholder, holding approximately 27% before its initial public offering. Following the company's public listing in July 2025, the stake declined to 23.1%. A disclosure dated April 3, 2026 showed New Power Plasma's ownership had increased to 27.1%.
On its website, Dowooinsys said it began mass production of UTG in 2019. The technology was first commercialized in Samsung's Galaxy Z Flip, the foldable smartphone launched in February 2020.
UTG remains the company's flagship product for foldable smartphones, while development is underway for larger information technology devices, including tablets and laptops.
Dowooinsys Vina's investment project in Vietnam was originally licensed in 2022 with registered capital of $30 million, covering about 45,000 sqm and designed to produce 900,000 units annually.
Thai Nguyen authorities now state that the first investment phase totals $120 million, although publicly available information does not specify when or how the registered capital was revised from the initial amount.
In 2025, Dowooinsys Vina generated revenue of more than $62 million and employed 672 workers, including 650 Vietnamese employees.
At the groundbreaking ceremony, Thai Nguyen's Vice Chairman Tran Van Hau called on the company to expand recruitment and training of local workers and strengthen cooperation with businesses in the province to gradually increase the localization rate.