Affymetrix has received US Patent No. 7,053,198, "Functionated photoacid generator and functionated polymer system for biological microarray synthesis." Methods are described for the synthesis of polymer arrays, including the steps of: a) coating a substrate with a reactive polymer matrix and a photo carboxylic acid generator; b) exposing the substrate with patterned radiation to remove acid labile protecting group in reaction areas; and d) coupling a monomer into the reaction areas.

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