A multilayer printed wiring board has a core substrate, an interlayer insulation layer formed over the core substrate, conductive layers formed over the core substrate, and a via hole for providing electrical connection between the conductive layers. The powder applicator also includes an absorbent disc having a predetermined amount of powder. The staple cartridge can further comprise a plurality of staple cavities, wherein each staple cavity can comprise an opening in the deck which is at least partially surrounded by a ridge. The first reflective surface is positioned to reflect the electromagnetic radiation conditioned by the correcting plate. Each of these pin-shaped members supports the moving frame in parallel to the fixed plate, has ends that contact the fixed plate and the moving frame and that have curved surfaces, and tilts in the substantially perpendicular direction in response to movement of the moving frame about the one end as a fulcrum.