An object of the invention is to provide a process for producing a synthetic quartz glass while taking account of a refractive index distribution remaining in the synthetic quartz glass; a jig for use in the synthetic-quartz-glass production process; and a synthetic quartz glass for an optical member, produced by the process. The permanent magnet motor is mounted directly to an air screw compressor. The carry calculation network includes an ordered group of independent carry generators. In certain embodiments, the neurotoxins are obtained from Clostridium botulinum. Furthermore, the present invention is also a means for molding the backside of said substrate, either simultaneously or in multiple steps, such that active devices or portions of a given active device can be formed on both front and back sides of the substrate. In the hinged frame at least two rollers are placed, positioned adjacently, which, in a roller removal position of the hinged frame, can be removed from the hinged frame sideways via the removal opening formed by the opened-out side flap.