Georgetown University of Washington, DC, has received US Patent No. 8,349,584, "Microarrays and their manufacture." A method is claimed for creating two- and three-dimensional arrays. Plates of sample materials are stacked to create primary stacks. These primary stacks are then sliced to form combs, which are, in turn, stacked to form secondary stacks. The secondary stacks are then sliced to form tertiary plates or two-dimensional arrays. According to the patent, the tertiary plates can also be stacked to form three-dimensional arrays.