1. IBM Research - Zurich, Säumerstrasse 4, CH-8803 Rüschlikon, Switzerland
2. Advanced Microelectronic Center Aachen (AMICA) AMO GmbH, Otto-Blumenthal Strasse 25, D-52074 Aachen, Germany
3. Macromolecular Chemistry Group and Institute for Polymer Technology, Bergische Universität Wuppertal, Gauss-Strasse 20, D-42119 Wuppertal, Germany