According to ChainCatcher, South Korean glassmaker JNTC will supply glass platters for hard disk drives to Seagate, with production at its Vietnam plant scheduled to begin in the first quarter of next year and supply to expand from the second quarter. JNTC has completed a mass-production line at its third factory in Viet Tri, Vietnam. Converted from a plant producing cover glass for wearables and vehicles, the facility has received about 55 billion won in investment since the end of 2024 and currently has annual capacity of approximately 120 million to 170 million platters.
JNTC expects the business to begin contributing revenue in the first quarter of next year and generate hundreds of billions of won in additional annual sales. It plans to prioritize Seagate through 2030 before expanding to customers including Western Digital and Toshiba. The article estimates that Hoya and JNTC will account for about 60% and 40%, respectively, of Seagate’s future glass-platter purchases. JNTC also aims to raise annual capacity to 400 million to 500 million units over the medium to long term.