- GNC materials inc
- Silicon Wafer,Polished Wafer,Epi wafer,Oxide Wafer.
- Address:# 506, 5F, Miwon BLDG, 43, youido-dong, Youngdungpo-Gu
- Optowell Co,.Ltd.
- EPI Wafer,Chip,TO Package,TOSA,ROSA,VCSEL.
- Address:# 214 Technoville-B
- Dastech. Inc.
- Zirconia (Fused Stabilized Zirconia),Magnesia (MgO-C Brick),Hermetic Glass Powder,Antistatic Packing Bag,Sapphire Single Crystal,Fused Magnesia,Epi Wafer, HB Blue LED,Magnesia (MgO Heater Element),Magnesia (Fused Magnesia),MgO Heater Element,Polycite (Ser.
- Address:Yeoksam 1-dong ,Gangnam-gu
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