Abstract: The aim of the invention is to produce an electricity-producing unit that enables a motor vehicle of any conceivable design to be equipped with said invention and thus to produce a motor vehicle that is driven purely by one or more electric motors, wherein the electricity-generating unit works pollutant-free during operation, is environmentally friendly, generates little noise, and has a very small design. Said aim is achieved by a drive system comprising a turbine (1/1), a differential gear (1/2), a generator (1/3), a control unit (1/4), and a starter (1/5), wherein only electric motors are provided to drive the wheels of the motor vehicle.

Abstract: Point defects or impurities, which are detrimental to the quality of elecnic components, can be eliminated by means of rearsurface damage, which induces dislocations and/or stacking faults, by means of mechanical stress to the semiconductor wafers used in the manufacture of those components. For this purpose, the semiconductor wafers are brought into contact, before polishing, oxidation and thermal treatment, with moving carrier bodies covered with an elastic carrier medium having abrasive grain bonded to it, which creates the desired mechanical stress by forming a large number of very fine scratches and fissures in the surface of the semiconductor wafers.