| Business | Phone |
| Ball Semiconductor Inc 415 Century Pkwy, Allen 75013 | (972) 359-2400 |
| Crysteco Epitaxial Inc 301 Ridgemont Dr, Allen 75002 | (972) 727-7207 |
| Fsi International Inc 600 Millenium Dr, Allen 75013 | (972) 643-2000 |
| Micron Technology Inc 1025 Central Expy S 100, Allen 75013 | (972) 521-5200 |
| Okmetic Inc 301 Ridgemont Dr, Allen 75002 | (972) 747-8600 |
| Photronics Inc 601 Millenium Dr, Allen 75013 | (972) 889-6275 |
| Wiquest Communications Inc 915 Enterprise Blvd 200, Allen 75013 | (214) 547-1600 |
| R & R Electrical Svc Plus 701 Spring Brook Dr, Allen 75002 | (972) 359-0199 |
| Quick Filter Tech Inc 1022 S Greenville Ave 200, Allen 75002 | (214) 547-0460 |
| Integrated Silicon Solution 1812 San Leanna Dr, Allen 75013 | (214) 383-2607 |