An electrical terminal block, especially for locking onto a mounting rail, has a plurality of adjacent base terminals and connectors. The method entails providing a substrate including a photoalignment layer on top of a layer of liquid crystal molecules. These mass tagging methods are useful for oligomer sequencing, determining the relative abundances of molecules from different samples, and identifying individual molecules or chemical processing steps in combinatorial chemical libraries. The apparatus can be made small, and productivity of the double-sided original is improved. The receiving surface border portions are attached to the wafer to surround the light receiving surface in each of the receiving surface border portions.