| Business | Phone |
| Micro Summitt Corp 3917 Yellowstone St, Irving 75062 | (972) 871-7200 |
| Yieldwerx Semiconductor 320 Decker Dr, Irving 75062 | (972) 719-2635 |
| Amkor Technology Inc 2425 Gateway Dr, Irving 75063 | (972) 580-1879 |
| Carsem Inc 6210 N Belt Line Rd 105, Irving 75063 | (972) 580-1706 |
| Fairchild Semiconductor 7701 Las Colinas Rdg # 400, Irving 75063 | (972) 869-4791 |
| Toshiba Ceramics America Inc 300 E Rural Ln 107, Irving 75039 | (972) 444-0905 |
| Hitachi Semiconductor America 1505 W Walnut Hill Ln, Irving 75038 | (972) 580-1514 |
| Hitachi Semiconductor America 6431 Longhorn Dr, Irving 75063 | (972) 580-0088 |
| Kokusai Electric Co Ltd 5525 N Macarthur Blvd, Irving 75038 | (972) 714-0030 |
| Mgn Intl Southwest 205 Touchdown Dr, Irving 75063 | (972) 373-9750 |
| Supertex Inc 6220 N Belt Line Rd 207, Irving 75063 | (214) 596-9010 |
| Teccor Electronics 1800 Hurd Dr, Irving 75038 | (972) 580-1515 |