An optical pickup device includes an objective lens, with a numerical aperture being not less than 1, having a solid immersion lens which is made up by a spherical portion and a flat portion parallel to a surface of an optical disc. More particularly, a seal is provided having at least one slit scoring fewer than all of the layers of the seal. A single configuration file comprising settings for multiple aspects of network connectivity may be generated based on preferences entered by a system administrator, or by exporting current settings from a particular computing device. The films may be coated onto the cutting edge of a micro-cutting tool to strengthen the tool, thereby extending its lifetime without significantly increasing the diameter or radius of curvature of the cutting surface.