HanWool Materials Science, Inc. is a South Korea-based technology company primarily engaged in the research, development, manufacturing, and commercialization of optical transmission equipment, carrier network infrastructure, and advanced semiconductor and display materials. Founded in 2000 and headquartered in Seongnam-si, Gyeonggi-do, South Korea, the company operates across two core business segments: Telecommunications and Advanced Materials.
The company's Telecommunications segment provides comprehensive network equipment and infrastructure solutions, including: Multi-Service Provisioning Platforms (MSPP); Packet Transport Networks (PTN) and Packet Optical Transport Networks (POTN); Carrier Ethernet switches; optical channel subscriber multiplexers; digital cross-connect systems (DCS); dedicated optical leased-line transmission devices; front-haul and backhaul transmission systems for 5G and next-generation 6G cellular networks; and quantum cryptography communication equipment. In addition to hardware manufacturing, the company provides turnkey network construction, systems integration, and maintenance services to domestic telecommunications carriers, transportation authorities such as the Korea National Railway, public sector enterprises, financial institutions, and military organizations throughout South Korea.
The Advanced Materials segment, operated primarily through subsidiaries including JK Materials and Hanwool Semiconductor, specializes in high-performance specialty chemicals and electronic materials, including: photosensitive materials (PSM) and photoresist chemical agents for semiconductor photolithography patterning; packaging and dielectric materials for high bandwidth memory (HBM) applications, such as photosensitive polyimide (PSPI) and polybenzoxazole (PBO); bottom anti-reflective coating (BARC) formulations; spin-on hardmask (SOH) materials; lanthanum oxide and rare-earth compounds for advanced microelectronics; and thin-film materials for organic light-emitting diode (OLED) displays.
In recent developments, the company executed a strategic transformation and corporate rebranding in January 2024, changing its name from Telefield Inc. to HanWool Materials Science, Inc. to mark its expansion from legacy telecommunications equipment into high-value semiconductor and electronic materials. Following an ownership and management transition, the company reinforced its materials capabilities by acquiring secondary equity stakes in Hanwool Semiconductor and expanding operations at its subsidiary JK Materials, which secured regulatory process safety management approvals to initiate commercial mass production of semiconductor and display photosensitive materials. Additionally, the company broadened its secure communications portfolio through a technology transfer agreement with the Korea Institute of Science and Technology Information (KISTI) to integrate hybrid quantum cryptographic security protocols into its optical network infrastructure systems.