| Manufacturer | CB Certificate No. (IECQ Certificate No.) | | CB/NAI | Issue Date | |
|---|
| 1 |  ABC Taiwan Electronics Corp. |  |
| | 50600560 ITL (IECQ-L ULTW 24.0001) | | ULTW (TAIWAN ) | 2024/01/08 | |
| 1 | ADDA Corporation | |
| | T1002 (M-IECQ ECB 04.0003) | | ECB (United States of America) | 2000/02/23 | |
| 1 | Advanced Lithium Electrochemistry Co., L... | |
| | 50600020 ITL (IECQ-L ULTW 14.0001) | | ULTW (TAIWAN ) | 2022/12/26 | |
| 1 | Advanced Optoelectronic Technology Inc. | |
| | 20005894 ITL (IECQ-L ULTW 20.0003) | | ULTW (TAIWAN ) | 2024/01/22 | |
| 1 | Advanced Semiconductor Engineering, Inc.... | |
| | 20004520 ITL (IECQ-L ULTW 09.0027) | | ULTW (TAIWAN ) | 2023/09/21 | |
| 1 | Advances Semiconductor Engineering, Inc.... | |
| | 20006742 ITL (IECQ-L ULTW 12.0002) | | ULTW (TAIWAN ) | 2023/07/22 | |
| 1 | Ardentec Corporation | |
| | 20000171 ITL (IECQ-L ULTW 14.0003) | | ULTW (TAIWAN ) | 2023/12/12 | |
| 1 | Aristotle Enterprises Inc. | |
| | T1004 (IECQ-M ULTW 08.0003) | | ULTW (United States of America) | 2000/10/10 | |
| 4 | Atotech Taiwan Limited, Advanced Technol... | |
| | 1.72.0088 (IECQ-L NSAIUS 08.0005) | | NSAIUS () | 2015/02/08 | |
| | 1.72.0088/A (IECQ-L NSAIUS 08.0005-02) | | NSAIUS () | 2015/02/08 | |
| | 1.72.0119/A (IECQ-L NSAIUS 09.0002-01) | | NSAIUS () | 2014/10/16 | |
| | 1.72.0088 (IECQ-L NSAIUS 08.0005) | | NSAIUS () | 2014/10/16 | |
| 1 | Atotech Taiwan Limited, Chemical Analysi... | |
| | 1.72.0119 (IECQ-L NSAIUS 09.0002) | | NSAIUS (UNITED STATES) | 2013/12/24 | |
| 1 | ATP Electronics Taiwan Inc. Reliability ... | |
| | 50600264 ITL (IECQ-L ULTW 19.0009) | | ULTW (TAIWAN ) | 2022/12/18 | |
| 2 | AU Optronics Corp. | |
| | T1136-1 (IECQ-L ULTW 10.0001) | | ULTW (TAIWAN ) | 2011/11/07 | |
| | T1136 (IECQ-L ULTW 08.0002) | | ULTW (TAIWAN ) | 2011/11/07 | |
| 1 | Bio Materials Analysis Technology Inc. | |
| | T1107-6 (IECQ-L ULTW 16.0003-06) | | ULTW (TAIWAN ) | 2017/08/31 | |
| 1 | Cada Industrial Co. Ltd., Reliability Te... | |
| | T1126 (L-IECQ ECCB 07.0001) | | NSAIUS (United States of America) | 2007/05/31 | |
| 1 | Cathay Consolidated, Inc. | |
| | 20005349 ITL (IECQ-L ULTW 16.0004) | | ULTW (TAIWAN ) | 2022/09/25 | |
| 1 | Celxpert Energy Corporation | |
| | 20004236 ITL (IECQ-L ULTW 09.0006) | | ULTW (TAIWAN ) | 2023/01/19 | |
| 1 | Centra Science Corp. | |
| | T1006 (M-IECQ ECB 04.0007) | | ECB (United States of America) | 1997/08/01 | |
| 1 | Cheetah Inspection Inc. | |
| | 50600386 ITL (IECQ-L ULTW 21.0002) | | ULTW (TAIWAN ) | 2024/01/08 | |
| 1 | Chenrol Electric Wire & Cable Co., Ltd. | |
| | T1007 (M-IECQ ECB 04.0008) | | ULTW (United States of America) | 1997/07/23 | |
| 1 | Chi Mei Corporation Specialty Chemicals ... | |
| | 50600322 ITL (IECQ-L ULTW 19.0005) | | ULTW (TAIWAN ) | 2022/09/01 | |
| 1 | Chi Yuan Plastic Industrial Co., Ltd. | |
| | T1008 (M-IECQ ECB 04.0009) | | ULTW (United States of America) | 1998/06/23 | |
| 1 | Chin-Poon Industrial Co., Ltd. Taoyuan P... | |
| | 20000513 ITL (IECQ-L ULTW 19.0006) | | ULTW (TAIWAN ) | 2022/10/28 | |
| 2 | CKT Rubber Co., Ltd. | |
| | T1118 (M-IECQ ECCB 06.0001) | | NSAIUS (United States of America) | 2006/02/08 | |
| | T1118 (M-IECQ ECCB 06.0001) | | NSAIUS (United States of America) | 2006/02/08 | |
| 1 | CROSS MODULE TECH CO. | |
| | 50600584 ITL (IECQ-L ULTW 24.0002) | | ULTW (TAIWAN ) | 2024/03/11 | |
| 1 | CROWNPO TECHNOLOGY INC. | |
| | T1036 (M-IECQ ECB 04.0036) | | ULTW (United States of America) | 1998/09/16 | |
| 1 | Cyntec Co., Ltd. | |
| | T1011 (M-IECQ ECB 04.0012) | | ULTW (United States of America) | 1997/03/06 | |
| 1 | Darfon Electronics Corp. Reliability Tes... | |
| | T1144 (IECQ-L ULTW 10.0002) | | ULTW (TAIWAN ) | 2010/11/11 | |
| 1 | DEKRA IST Reliability Services Inc. | |
| | DEKRA-T4-001 (IECQ-L DEKRA 16.0001) | | DEKRA (NETHERLANDS) | 2016/08/16 | |
| 1 | Discovery High Technology Co., Ltd. | |
| | T1119 (M-IECQ ECCB 06.0002) | | NSAIUS (United States of America) | 2006/02/08 | |
| 1 | Dynapack International Technology Corp. | |
| | 20003976 ITL (IECQ-L ULTW 09.0004) | | ULTW (TAIWAN ) | 2024/03/04 | |
| 3 | EPISTAR Corporation | |
| | T1012-3 (M-IECQ ECCB 08.0001) | | ULTW (United States of America) | 2007/12/24 | |
| | T1012-2 (M-IECQ ECCB 07.0001) | | ULTW (United States of America) | 2007/01/26 | |
| | T1012-1 (M-IECQ ECB 04.0013) | | ULTW (United States of America) | 1999/05/24 | |
| 1 | Eutech Microelectronics Inc. | |
| | T1106 (M-IECQ ECB 04.0089) | | ECB (United States of America) | 2004/10/02 | |
| 1 | Excellence Optoelectronics Inc. Environm... | |
| | 50600443 ITL (IECQ-L ULTW 22.0001) | | ULTW (TAIWAN ) | 2022/01/06 | |
| 1 | Exito Electronic Co., Ltd. | |
| | T1015-1 (M-IECQ ECB 04.0015) | | ECB (United States of America) | 2002/07/29 | |
| 1 | Faraday Technology Corp. | |
| | T1016 (M-IECQ ECB 04.0016) | | ULTW (United States of America) | 1997/08/13 | |
| 1 | FICO Precision Industry Co., Ltd. | |
| | T1098 (S-IECQ ECB 04.0001) | | ULTW (United States of America) | 2000/01/03 | |
| 2 | Formosa Advanced Technologies Co., Ltd. | |
| | 20000991 ITL (IECQ-L ULTW 09.0014) | | ULTW (TAIWAN ) | 2023/05/17 | |
| | T1018 (M-IECQ ECB 04.0018) | | ULTW (United States of America) | 1998/03/17 | |
| 1 | Formosa Advanced Technologies Co., Ltd. ... | |
| | 505499 ITL (IECQ-L ULTW 13.0002) | | ULTW (TAIWAN ) | 2022/07/12 | |
| 1 | Fulltronic Corporation | |
| | T1020 (M-IECQ ECB 04.0019) | | ULTW (United States of America) | 2000/06/12 | |
| 1 | GEM Terminal Ind. Co., Ltd. | |
| | T1022 (M-IECQ ECB 04.0022) | | ULTW (United States of America) | 1998/06/23 | |
| 1 | GlobalWafers Co., Ltd. Precision Machine... | |
| | 50600157 ITL (IECQ-L ULTW 17.0002) | | ULTW (TAIWAN ) | 2020/03/03 | |
| 1 | Glorytech Technology Co., Ltd | |
| | T1111 (M-IECQ ECB 04.0092) | | ULTW (United States of America) | 2004/09/21 | |
| 1 | Golden-Tech Technologies Inc. | |
| | 20004039 ITL (IECQ-L ULTW 09.0015) | | ULTW (TAIWAN ) | 2023/06/16 | |
| 1 | HannStar Display Corp. Reliability Test ... | |
| | 20001189 ITL (IECQ-L ULTW 19.0008) | | ULTW (TAIWAN ) | 2023/11/14 | |
| 1 | Hi-Sincerity Co., Ltd. | |
| | T1025 (M-IECQ ECB 04.0023) | | ULTW (United States of America) | 2002/03/15 | |
| 1 | Hitachi Chemical Co. (Taiwan) Ltd. Taoyu... | |
| | T1099 (S-IECQ ECB 04.0002) | | ULTW (United States of America) | 1999/11/04 | |
| 2 | Hitachi Chemical Co., (Taiwan)Ltd. | |
| | T1026-1 (M-IECQ ECB 04.0024) | | ULTW (United States of America) | 1996/10/30 | |
| | T1026-2 (M-IECQ ECB 04.0025) | | ULTW (United States of America) | 1996/10/30 | |
| 1 | Hold Key Electric Wire and Cable Co., Lt... | |
| | T1027-2 (M-IECQ ECB 04.0027) | | ULTW (United States of America) | 1998/09/14 | |
| 1 | INNOLUX CORPORATION Testing Center Mater... | |
| | TW-HSPM-ITL-1004 (IECQ-L ULTW 14.0002) | | ULTW () | 2014/12/27 | |
| 1 | Innolux Corporation (Jhunan) Testing cen... | |
| | 20003329 ITL (IECQ-L ULTW 09.0023) | | ULTW (TAIWAN ) | 2023/12/19 | |
| 2 | Innolux Corporation (Tainan) Testing Cen... | |
| | 20005895 ITL (IECQ-L ULTW 09.0023-03) | | ULTW (TAIWAN ) | 2023/12/19 | |
| | 20005898 ITL (IECQ-L ULTW 09.0023-07) | | ULTW (TAIWAN ) | 2022/11/06 | |
| 1 | INPAQ Technology Co., Ltd. | |
| | T1030 (M-IECQ ECB 04.0030) | | ULTW (United States of America) | 1999/04/27 | |
| 1 | INPAQ Technology (Taichung) Co., Ltd. | |
| | T1030-1 (M-IECQ ECCB 07.0002) | | ULTW (United States of America) | 2007/02/21 | |
| 1 | integrated Service Technology Inc. | |
| | DEKRA-IECQ-T5-2022/2 (IECQ-L DEKRA 16.0002-03) | | DEKRA (NETHERLANDS) | 2023/05/06 | |
| 3 | Integrated Service Technology, Inc. | |
| | DEKRA-IECQ-T5-2022/2 (IECQ-L DEKRA 16.0002-02) | | DEKRA (NETHERLANDS) | 2023/05/06 | |
| | DEKRA-T5A-003 (IECQ-L DEKRA 16.0002) | | DEKRA (NETHERLANDS) | 2022/07/28 | |
| | DEKRA-T5B-003 (IECQ-L DEKRA 16.0002-01) | | DEKRA (NETHERLANDS) | 2022/07/28 | |
| 1 | Integrated Services of Quality Assessmen... | |
| | T1137 (IECQ-L NSAIUS 08.0007) | | NSAIUS (UNITED STATES) | 2011/06/22 | |
| 1 | Inventec AE PA Testing Laboratory | |
| | 50600525 ITL (IECQ-L ULTW 23.0001) | | ULTW (TAIWAN ) | 2023/07/06 | |
| 1 | Inventec Corporation (Taoyuan), Chemical... | |
| | TW-HSPM-ITL-1003 (IECQ-L ULTW 08.0001) | | ULTW (TAIWAN ) | 2017/08/09 | |
| 1 | Jenn Feng Electric Industrial Co., Ltd. | |
| | T1031 (M-IECQ ECB 04.0031) | | NSAIUS (United States of America) | 2000/03/31 | |
| 2 | Joyin Co., Ltd. | |
| | T1032 (Q-IECQ ECB 04.0004) | | ULTW (United States of America) | 1999/02/03 | |
| | T1032-1 (M-IECQ ECB 04.0032) | | ULTW (United States of America) | 1997/08/12 | |
| 1 | Kai Hwa Circuits Industrial Co., Ltd. | |
| | T1033 (M-IECQ ECB 04.0033) | | ULTW (United States of America) | 2001/03/09 | |
| 1 | KOA Kaohsiung Corp. | |
| | T1034 (M-IECQ ECB 04.0034) | | ULTW (United States of America) | 1998/11/17 | |
| 1 | K.S. TERMINALS INC. | |
| | 20004402 ITL (IECQ-L ULTW 09.0008) | | ULTW (TAIWAN ) | 2023/08/31 | |
| 1 | Lingsen Precision Industries Ltd. | |
| | T1035 (M-IECQ ECB 04.0035) | | ULTW (United States of America) | 1999/09/08 | |
| 7 | Materials Analysis Technology Inc. | |
| | 20003698 ITL (IECQ-L ULTW 16.0003-04) | | ULTW (TAIWAN ) | 2024/02/10 | |
| | 20001845 ITL (IECQ-L ULTW 16.0003) | | ULTW (TAIWAN ) | 2023/08/15 | |
| | 20001846 ITL (IECQ-L ULTW 16.0003-01) | | ULTW (TAIWAN ) | 2023/08/15 | |
| | 20002490 ITL (IECQ-L ULTW 16.0003-02) | | ULTW (TAIWAN ) | 2023/08/15 | |
| | 50600097 ITL (IECQ-L ULTW 16.0003-07) | | ULTW (TAIWAN ) | 2023/08/15 | |
| | 50600421 ITL (IECQ-L ULTW 16.0003-09) | | ULTW (TAIWAN ) | 2023/08/15 | |
| | T1107-5 (IECQ-L ULTW 16.0003-05) | | ULTW (TAIWAN ) | 2016/07/28 | |
| 1 | Materials Service Platform Corporation ... | |
| | 50600585 ITL (IECQ-L ULTW 24.0003) | | ULTW (TAIWAN ) | 2024/04/05 | |
| 1 | Microelectronics Technology Inc. Environ... | |
| | 20004118 ITL (IECQ-L ULTW 09.0017) | | ULTW (TAIWAN ) | 2022/06/22 | |
| 1 | Microelectronics Technology Inc. Equipme... | |
| | 20004119 ITL (IECQ-L ULTW 09.0016) | | ULTW (TAIWAN ) | 2022/06/22 | |
| 1 | MiTAC Computing Technology Corporation (... | |
| | T1146 (IECQ-L ULTW 11.0002) | | ULTW (TAIWAN ) | 2017/05/15 | |
| 1 | MiTAC INTERNATIONAL CORPORATION (Acousti... | |
| | T1108 (IECQ-L ULTW 09.0019) | | ULTW (United States of America) | 2010/06/03 | |
| 1 | MiTAC International Corporation (Reliabi... | |
| | 1.72.0035 (IECQ-L NSAIUS 09.0003) | | NSAIUS (United States of America) | 2013/10/18 | |
| 1 | MSSCORPS CO., LTD. | |
| | 50600259 ITL (IECQ-L ULTW 19.0001) | | ULTW (TAIWAN ) | 2023/04/27 | |
| 2 | MSSCORPS CO., LTD. Zhubei BRANCH | |
| | 50600440 ITL (IECQ-L ULTW 22.0003-01) | | ULTW (TAIWAN ) | 2024/02/21 | |
| | 50600439 ITL (IECQ-L ULTW 22.0003) | | ULTW (TAIWAN ) | 2022/01/17 | |
| 1 | MSSCORPS CO., LTD. Hsinchu BRANCH | |
| | 50600343 ITL (IECQ-L ULTW 20.0001) | | ULTW (TAIWAN ) | 2022/01/17 | |
| 1 | MSSCORPS CO., LTD. STSP BRANCH | |
| | 50600299 ITL (IECQ-L ULTW 19.0002) | | ULTW (TAIWAN ) | 2023/04/27 | |
| 1 | Nienyi Industrial Corp. | |
| | 50600139 ITL (IECQ-L ULTW 17.0004-02) | | ULTW (TAIWAN ) | 2023/09/22 | |
| 1 | Octekconn Enterprise Co., Ltd. | |
| | T1040 (M-IECQ ECB 04.0039) | | ECB (United States of America) | 1999/08/26 | |
| 1 | Pacific Energytech Co., Ltd. | |
| | T1043-2 (M-IECQ ECB 04.0042) | | ECB (United States of America) | 2001/09/03 | |
| 1 | Pacific Precise Industries Co., Ltd. | |
| | T1133 (IECQ-L ULTW 09.0007) | | ULTW (TAIWAN ) | 2017/08/07 | |
| 1 | PAL Acoustics Technology Ltd. | |
| | T1131 (L-IECQ ECCB 08.0002) | | ULTW (United States of America) | 2008/03/07 | |
| 2 | POWERCHIP SEMICONDUCTOR MANUFACTURING CO... | |
| | 50600201 ITL (IECQ-L ULTW 17.0005) | | ULTW (TAIWAN ) | 2023/10/18 | |
| | T1160 (IECQ-L ULTW 16.0002) | | ULTW (TAIWAN ) | 2018/10/01 | |
| 1 | Powertech Technology Inc. RA/CAL Lab | |
| | 50600039 ITL (IECQ-L ULTW 21.0004) | | ULTW (TAIWAN ) | 2021/10/19 | |
| 1 | Prime View International Co., Ltd. | |
| | T1110 (L-IECQ ECB 04.0015) | | ULTW (United States of America) | 2004/07/26 | |
| 1 | Rapitech Calibration Lab. | |
| | 20004334 ITL (IECQ-L ULTW 09.0029) | | ULTW (TAIWAN ) | 2023/10/16 | |
| 1 | Real Test Industry Co., Ltd. | |
| | 50600079 ITL (IECQ-L ULTW 16.0001) | | ULTW (TAIWAN ) | 2023/02/27 | |
| 1 | Rong Tseng Industrial Co., Ltd., Song Ta... | |
| | T1101 (S-IECQ ECB 04.0003) | | ULTW (United States of America) | 2000/02/23 | |
| 1 | Sea & Land Integrated Corp. | |
| | T1050 (M-IECQ ECB 04.0047) | | ECB (United States of America) | 2002/03/04 | |
| 1 | SGS Taiwan Ltd., Chemical Laboratory - T... | |
| | TW-HSPM-ITL-1001 (IECQ-L NSAIUS 09.0001) | | NSAIUS (UNITED STATES) | 2012/01/19 | |
| 1 | Siliconware Precision Industries Co., Lt... | |
| | 20005220 ITL (IECQ-L ULTW 22.0005) | | ULTW (TAIWAN ) | 2022/10/03 | |
| 1 | SINBON Electronics Co., Ltd. | |
| | T1053 (M-IECQ ECB 04.0052) | | ULTW (United States of America) | 2001/07/12 | |
| 4 | Solen Electric Co., Ltd. | |
| | T1056-4 (M-IECQ ECB 04.0057) | | ULTW (United States of America) | 1997/10/06 | |
| | T1056-3 (M-IECQ ECB 04.0056) | | ULTW (United States of America) | 1997/10/06 | |
| | T1056-2 (M-IECQ ECB 04.0055) | | ULTW (United States of America) | 1997/10/06 | |
| | T1056-1 (M-IECQ ECB 04.0054) | | ULTW (United States of America) | 1997/06/10 | |
| 1 | Spectrum Research & Testing Lab., Inc. | |
| | 1.72.0040 (IECQ-L NSAIUS 08.0003) | | NSAIUS () | 2015/09/25 | |
| 1 | Spirox Corporation, IC Verification Cent... | |
| | 1.72.0103 (IECQ-L NSAIUS 08.0004) | | NSAIUS () | 2015/04/07 | |
| 1 | Standard Technology inc. | |
| | T1087 (L-IECQ ECB 04.0002) | | ULTW (United States of America) | 1996/02/04 | |
| 1 | S&M Earth Electric Co., Ltd. | |
| | T1049 (M-IECQ ECB 04.0046) | | ULTW (United States of America) | 2001/10/02 | |
| 3 | TA-I Technology Co. Ltd | |
| | T1060-3 (Q-IECQ ECB 04.0003) | | ULTW (United States of America) | 1999/05/24 | |
| | T1060-2 (Q-IECQ ECB 04.0002) | | ULTW (United States of America) | 1999/05/24 | |
| | T1060-1 (Q-IECQ ECB 04.0001) | | ULTW (United States of America) | 1999/05/24 | |
| 1 | TA-I Technology Co., Ltd. | |
| | T1060-4 (M-IECQ ECB 04.0061) | | ULTW (United States of America) | 1997/01/08 | |
| 1 | Ta Hsing Electric Wire & Cable Co., Ltd. | |
| | T1059 (M-IECQ ECB 04.0060) | | ULTW (United States of America) | 1996/10/22 | |
| 1 | TA YIH INDUSTRIAL CO., LTD. TA-YIH Lab. | |
| | 50600445 ITL (IECQ-L ULTW 22.0002) | | ULTW (TAIWAN ) | 2022/01/18 | |
| 1 | Tai Hong Circuit Industrial Co., Ltd. | |
| | T1061 (C-IECQ ECCB 08.0001) | | ULTW (United States of America) | 2002/07/18 | |
| 1 | Tai Hong Circuit Industrial Co., Ltd. | |
| | T1109-1 (M-IECQ ECB 04.0091) | | ULTW (United States of America) | 1995/04/07 | |
| 1 | TAIWAN MEMORY QUALIFICATION CENTER | |
| | T1149 (IECQ-L ULTW 12.0001) | | ULTW () | 2015/06/26 | |
| 1 | Taiwan Testing and Certification Center | |
| | 20004032 ITL (IECQ-L ULTW 09.0012) | | ULTW (TAIWAN ) | 2023/05/24 | |
| 1 | TATUNG CO. (Taoyuan Wire and Cable Plant... | |
| | T1064 (M-IECQ ECB 04.0064) | | ULTW (United States of America) | 2000/02/15 | |
| 1 | TEKFORCE CO., LTD. | |
| | T1113 (M-IECQ ECB 04.0093) | | ULTW (United States of America) | 2004/09/06 | |
| 1 | Thermoway Industrial Co., Ltd. | |
| | 20004501 ITL (IECQ-L ULTW 09.0013) | | ULTW (TAIWAN ) | 2023/03/03 | |
| 5 | Underwriters Laboratories Taiwan Co., Lt... | |
| | 505508 ITL (IECQ-L ULTW 19.0003) | | ULTW (TAIWAN ) | 2023/09/19 | |
| | 50600360 ITL (IECQ-L ULTW 19.0003-01) | | ULTW (TAIWAN ) | 2023/09/19 | |
| | 50600284 ITL (IECQ-L ULTW 19.0004) | | ULTW (TAIWAN ) | 2023/04/10 | |
| | 50600318 ITL (IECQ-L ULTW 19.0004-01) | | ULTW (TAIWAN ) | 2023/04/10 | |
| | 50600319 ITL (IECQ-L ULTW 19.0004-02) | | ULTW (TAIWAN ) | 2022/05/02 | |
| 2 | Unimicron Technology Corporation | |
| | T1095 (IECQ-L ULTW 11.0003) | | ULTW (TAIWAN ) | 2011/06/13 | |
| | T1095-1 (IECQ-L ULTW 11.0004) | | ULTW (TAIWAN ) | 2011/06/13 | |
| 2 | Unisonic Technologies Co., Ltd. | |
| | T1104-1 (S-IECQ ECB 04.0006) | | ULTW (United States of America) | 2000/09/25 | |
| | T1104-2 (S-IECQ ECB 04.0007) | | ULTW (United States of America) | 2000/09/25 | |
| 1 | Universal Global Technology (Shenzhen) C... | |
| | T1068-3 (M-IECQ ECB 04.0068) | | ULTW (United States of America) | 1996/04/02 | |
| 2 | Universal Scientific Industrial Co., Ltd... | |
| | T1068-1 (M-IECQ ECB 04.0066) | | ULTW (United States of America) | 1996/04/02 | |
| | T1068-2 (M-IECQ ECB 04.0067) | | ULTW (United States of America) | 1996/04/02 | |
| 1 | VESP Technology Corporation | |
| | 50600164 ITL (IECQ-L ULTW 17.0001) | | ULTW (TAIWAN ) | 2024/02/11 | |
| 1 | VisEra Technologies Company Ltd. Reliabi... | |
| | T1156 (IECQ-L ULTW 15.0001) | | ULTW () | 2015/02/24 | |
| 1 | Wafer Works Corporation | |
| | T1070 (M-IECQ ECB 04.0070) | | ECB (United States of America) | 2000/02/15 | |
| 1 | WAFER WORKS CORP. (Semiconductor Materia... | |
| | 20006234 ITL (IECQ-L ULTW 22.0004) | | ULTW (TAIWAN ) | 2022/02/24 | |
| 1 | Walsin Lihwa Corp. | |
| | T1071-3 (M-IECQ ECB 04.0073) | | ULTW (United States of America) | 1996/06/10 | |
| 2 | Walsin Technology Corporation | |
| | T1072-3 (M-IECQ ECCB 07.0003) | | ULTW (United States of America) | 2007/05/08 | |
| | T1072-1 (M-IECQ ECB 04.0074) | | ULTW (United States of America) | 1996/04/24 | |
| 1 | Well Fortune Technical Co., Ltd. | |
| | T1073 (M-IECQ ECB 04.0076) | | ULTW (United States of America) | 1999/08/23 | |
| 1 | Wide Band Signal Processing Lab., EW, IC... | |
| | 50600197 ITL (IECQ-L ULTW 17.0003) | | ULTW (TAIWAN ) | 2023/08/11 | |
| 5 | Winbond Electronics Corporation | |
| | T1074-5 (M-IECQ ECCB 07.0004) | | ULTW (United States of America) | 2007/07/04 | |
| | T1074-2 (M-IECQ ECB 04.0078) | | ULTW (United States of America) | 1993/05/27 | |
| | T1074-1 (M-IECQ ECB 04.0077) | | ULTW (United States of America) | 1993/05/27 | |
| | T1074-3 (M-IECQ ECB 04.0079) | | ULTW (United States of America) | 1993/05/27 | |
| | T1074-4 (M-IECQ ECB 04.0080) | | ULTW (United States of America) | 1993/05/27 | |
| 1 | WINSTEK SEMICONDUCTOR CORPORATION | |
| | T1105 (S-IECQ ECB 04.0008) | | ULTW (United States of America) | 2000/11/15 | |
| 1 | Winstek Semiconductor Co., Ltd. Reliabil... | |
| | 20002839 ITL (IECQ-L ULTW 18.0001) | | ULTW (TAIWAN ) | 2024/04/06 | |
| 1 | Xingfox Energy Technology Co., Ltd., Pro... | |
| | T1148 (IECQ-L ULTW 11.0006) | | ULTW (TAIWAN ) | 2017/10/17 | |
| 2 | Yealy Optic Electronic Co., Ltd. | |
| | T1122 (M-IECQ ECCB 06.0003) | | NSAIUS (United States of America) | 2006/04/10 | |
| | T1122-1 (M-IECQ ECCB 06.0004) | | NSAIUS (United States of America) | 2006/04/10 | |
| 1 | YETI Electronics Co., Ltd. | |
| | T1077 (M-IECQ ECB 04.0083) | | ULTW (United States of America) | 1999/12/13 | |
| 164 | | |