A thin film is fabricated while causing ions in a plasma P to be incident by effecting biasing relative to the space potential of the plasma P by imparting a set potential to the surface of a substrate 9. Diagnostic, therapeutic, and screening methods employing the polynucleotides and polypeptides of the present invention are also provided. The lens is wedged in the mask assembly. In one embodiment, the variable amount of support is achieved by providing both a primary body panel and a secondary body panel, with the secondary body panel configured to be removably attached to the primary body panel. Connection electrodes are disposed at the four corners of walls surrounding the cavity. This sum is divided by the number of entries in the set.