1. 3M Company
2. Atecom Technology Co. Ltd.
3. Brewer Science Inc.
4. Chipmetrics Oy
5. EV Group
6. Globalwafers Co. Ltd.
7. Hangzhou Semiconductor Wafer Co.Ltd .
8. Okmetic Oy
9. ROHM CO. LTD.
10. Shin-Etsu Chemical Co. Ltd.
11. Siltronic AG
12. Siltronix Silicon Technologies
13. SK siltron Co.Ltd.
14. Sumco Corporation
15. Wafer World Inc.