Patent ID: 7332273

Claim:
A method of forming an array of polymers on a surface of a substrate, comprising: providing a substrate comprising a solid support having a top surface and a bottom surface; disposing on said top surface a dichroic antireflective coating having an outermost surface; derivatizing said outermost surface to provide reactive functional groups protected by a photolabile protecting groups; photolyzing, with a wavelength of light that is photolytic to said photolabile protecting groups, a first selected region to remove said photolabile protecting groups in said first selected region and to provide exposed functional groups in said first selected region; coupling monomers protected by photolabile protecting groups, to said exposed functional groups in said first selected region; and repeating said steps of photolyzing and coupling in one or more subsequent selected regions overlapping all or part of said first selected region to form a plurality of different and positionally distinct polymer sequences contained in different features, wherein said antireflective coating absorbs greater than about 75% of said wavelength of light that is photolytic to said photolabile protecting groups.