1. imec, Large Area Electronics, Kapeldreef 75, 3001 Leuven, Belgium
2. KU Leuven, Department of Electrical Engineering, Kasteelpark Arenberg 10, 3001 Leuven, Belgium
3. EPFL, Microsystems Laboratory, CH-1015 Lausanne, Switzerland
4. The Institute of Scientific and Industrial
Research (ISIR), Osaka University, 8-1 Mihogaoka, Ibaraki, 567-0047 Osaka, Japan