1. IMEC; Kapeldreef 75 3001 Leuven Belgium
2. TNO/Holst Centre; High Tech Campus 31 5656 AE Eindhoven The Netherlands
3. ESAT; KU Leuven; Kasteelpark Arenberg 10 3001 Leuven Belgium
4. Chungwha Picture Tubes, Ltd.; 1127 Heping Rd. Bade City Taoyuan Taiwan
5. Department of Applied Physics; Eindhoven University of Technology; P. O. Box 513 5600 MB Eindhoven The Netherlands