UNITED MICROELECTRONICS CORP

Wavetek operates in the foundry business, manufacturing wafers for customers. The company emphasizes high manufacturing quality and consistent, high manufacturing yields to enable customers to reliably estimate their wafer orders. Wavetek continuously enhances its production capacity and process technology to provide volume production and flexible, quick-to-market manufacturing services. All of its fabs operate 24 hours per day, seven days per week, with most maintenance performed concurrently with production. As of December 31, 2025, Wavetek has 12 manufacturing facilities: Fab 8A, Fab 8C, Fab 8D, Fab 8E, Fab 8F, Fab 8S, Fab 8N, Fab 12A, Fab 12i, Fab 12X, Fab 12M. These fabs are located in the R.O.C., Singapore, PRC, and Japan. The estimated full capacities and wafer sizes for these facilities are: * Fab 8A: 26,564 wafers per month (6-inch/150mm), commenced 1989. * Fab 8C: 71,700 wafers per month (8-inch/200mm), commenced 1995. * Fab 8D: 41,800 wafers per month (8-inch/200mm), commenced 1998. * Fab 8E: 39,450 wafers per month (8-inch/200mm), commenced 2000. * Fab 8F: 43,700 wafers per month (8-inch/200mm), commenced 1998. * Fab 8S: 48,800 wafers per month (8-inch/200mm), commenced 2000. * Fab 8N: 39,000 wafers per month (8-inch/200mm), commenced 2000. * Fab 12A: 83,300 wafers per month (8-inch/200mm), commenced 2003. * Fab 12i: 136,279 wafers per month (12-inch/300mm), commenced 2002. * Fab 12X: 57,207 wafers per month (12-inch/300mm), commenced 2004. * Fab 12M: 31,500 wafers per month (12-inch/300mm), commenced 2016. * Fab 12M: 39,767 wafers per month (12-inch/300mm), commenced 2005.