A multiwell plate is described that is used for assaying samples and is made from a plastic upper plate which forms the sidewalls of one or more wells and a transparent lower plate which forms the bottom walls of the wells. An attachment angle measuring device measures an attachment angle \u03b8 between an axle carrier and an absorber as in the following. The feedstock can include a polyalkylated aromatic component derived from an aromatic substrate. In the opening width reduction process, deposits are formed on a sidewall surface of the opening of the mask layer by a plasma generated from a gaseous mixture of an anisotropic etching gas and one of a depositive gas and H2 gas. For example, a copolymer perfluorodecyl methacrylate and 2-nitrobenzyl methacrylate is a suitable orthogonal fluorinated photoresist for use with fluorinated solvents and supercritical carbon dioxide in a photolithography process.