A probe array comprises a plurality of probes immobilized at a plurality of matrix sites on a substrate for capturing a target substance, wherein the probes are sequentially synthesized at the matrix sites on the substrate until a desired length, the probes are different from each other, and a labeling...http://www.google.com.au/patents/US7402384?utm_source=gb-gplus-sharePatent US7402384 - Methods for evaluating probe arrays