Methods and structures utilizing multiple configuration bitstreams to program integrated circuits (ICs) such as programmable logic devices, thereby enabling the utilization of partially defective ICs. A user design is implemented two or more times, preferably utilizing different programmable resources...http://www.google.de/patents/US7620863?utm_source=gb-gplus-sharePatent US7620863 - Utilizing multiple test bitstreams to avoid localized defects in partially defective programmable integrated circuits