A disc reproducing apparatus having a disc exchange function includes a housing section, a reproducing unit, a movement unit and a pull-out unit. The target substrate comprises a laser-transparent support having a laser-facing surface and a support surface. The compounds of the invention are suitable for use, for example, as hypolipidemics. The two substrates are then brought in contact with one another. One or more cranks are rotatably attached to the carrier and each has one or more wheels for engaging with and for massaging the user. The use of N2 plasma with optimized plasma parameters can remove through etching both the graphitic and fluorinated organic layers.