Patent ID: 7790389

Claim:
An array of polymers synthesized by photolithographic synthesis on a surface of a substrate, comprising: a first layer on a solid support, the first layer including one or more anti-reflective dielectric coatings on the solid support and a second layer including a plurality of different and positionally distinct polymers disposed on the first layer in different features, wherein the first layer is derivatized and includes a coating of functional groups protected with a photolabile protecting group, wherein a wavelength of light that is photolytic to the photolabile protecting groups is used to photolyze a first selected region to remove the photolabile protecting groups in the first selected region and to provide exposed functional groups in the first selected region, wherein the one or more dielectric coatings absorbs the wavelength of light that is exposed to photolabile protecting groups in the first selected region during the photolysis step of the synthesis process to prevent back reflection which may expose light to a region not in the first selected region, wherein a plurality of monomers are coupled to the exposed functional groups in the first selected region, and wherein the steps of photolyzing and coupling are repeated in one or more subsequent selected regions overlapping all or part of the first selected region to form positional distinct polymer sequences contained in different features.