- Deesys Co., Ltd.
- Address:257-18,Daeneung-ri ,Daegot-myeon ,Gimpo-si
- Tech-On Co.,Ltd
- Address:1599-2,Seocho-dong ,Seocho-gu
- Knowledge*on Inc.
- Address:513-37 Eoyang-Dong
- Sentech Korea Corp.
- Address:801-2 Ilsan Techno Town Bakseok, Ilsan
- Semihow Co.,Ltd
- Address:546-3, Sang-dong, Wonmi-gu
- Amkor Technology Korea, Inc
- Address:Amkor Technology Korea Co.,Daechon-dong ,Buk-gu
- DONG-A GEOVAN CO.,LTD
- Address:77-137 Street, Jang In-Road, Sasang-Gu
- Garam Electronics Corp
- Address:723,Singil 7-dong ,Yeongdeungpo-gu
- Optowell Co,.Ltd.
- Address:# 214 Technoville-B
- Barun Electronics Co., Ltd
- Address:634-1,Tongsam-ri ,Namsa-myeon ,Yongin-si
- HAN International Co., Ltd.
- Address:#1305, Seugyo sky tower B/D, Seogyo-Dong
- Rainbow Electronics Co., Ltd.
- Address:# 309, 11 seoun-ro, seocho-gu
- Deung Ju Instrument Co.,Ltd.
- Address:706-2,Haengsin-dong ,Deokyang-gu, Goyang-si
- KAYCOM CORPORATION
- Address:# 711, HYUNDAE VENTURE VILLE SUSUGDONG, GANGNAMGU
- Ilsan Suntek Corp
- Address:357,Dangjeong-dong ,Gunpo-si
- Sung Il Moolsan Co. Ltd
- Address:82B/9L,Gojan-dong ,Namdong-gu
- Mattron Corp.
- Address:# 711 GITEC, 1121-9, Jung-Ri
- Tellord Co.,Ltd
- Address:170-5,Guro-dong ,Guro-gu
- GL&T
- Address:B-2306, WoolimBlue9, # 240-21, Yeomchang-dong
- flux korea
- Address: