- WISDOMSEMICONDUCTOR INC
- Address:A208 Daewoo Techno Park Dodang-Dong, Wommi-Gu
- TOP TECH ENG.
- Address:604-2 Guro-Dong
- C-tech
- Address:Bundang-Gu
- ALTI-ELECTRONICS INC
- Address:449-882, 90-1 Bong Myung-Ri, Namsa-Myun, Cheoin-Gu
- SamLim Tech
- Address:Bosung B/D 3rd Floor, 476-9, Shimgok-2Dong, Wonmi-Gu
- Optonica Corporation
- Address:235 Guro-dong, Guro-dong, Guro-gu