Se Gyung Hi Tech was founded in 2006 and listed on KOSDAQ in 2019 as a specialist in functional films for IT devices.
Its business rests on three pillars: decoration film, optical film, and protect/injection film (Glastic/PCPMMA), with a 2023 revenue mix of roughly 29.6% decoration film, 41.1% optical film, and 29.3% protect/injection film.
In optical film, which accounts for over 40% of revenue, the company has exclusively supplied Samsung Display with protective film for the ultra-thin glass (UTG) used in Samsung Electronics' foldable Galaxy Z series since 2019.
This protective film shields the UTG from external impact and supports fingerprint resistance and improved touch feel.
The decoration film segment applies color and design to the front and back housing of mobile devices, serving customers including Samsung Electronics, Oppo, and Xiaomi, and the company is known for pioneering its proprietary MDD (Micro Dry process Decoration) technique, giving it a claimed technological edge over rivals.
Glastic (PCPMMA), part of the protect/injection film segment, replicates a glass-like texture on plastic cases and is used mainly in mid-to-low-end smartphones.
In January 2023 the company acquired a 70% stake in Sesmat, a secondary battery materials developer, pursuing diversification such as new fire-retardant film materials for EV battery packs.
More recently, it has taken a stake in Seed Global, the Singapore subsidiary of China-linked UTG processor Seed, and is building a joint-venture glass plant in Korea, while also expanding into new product lines such as card plates and decoration film for mid-size IT devices.