Abstract: The present invention discloses a burr removing apparatus including a base for placing the compact disc on, and a pressing apparatus equipped on the base and corresponding to the inner circle of the compact disc for moving up and down to eliminate a bur at the inner circle of the compact disc. An upper and a lower inhaling apparatus are respectively equipped in the pressing apparatus and the base, and extend respectively to the surfaces of the pressing apparatus and the base. The upper and lower inhaling apparatus have the upper and lower inhaling holes to inhale the bur eliminated. The present invention eliminates and inhales the redundancy before bonding the discs, so the smoothness of the disc can be improved to avoid the bubbles while bonding, and providing a disc with good mechanical properties and weather-resistance.

Abstract: The present invention discloses a film structure of a rewritable compact disc including a transparent substrate on which sequentially laminated a phase-change recording layer, a dielectric layer and a reflective layer; and a barrier layer located between the dielectric layer and the reflective layer to insulate the dielectric layer and the reflective layer, and the feature of the barrier layer is that the barrier layer is composed of a germanium compound. The present invention provides an easily controlled process of the film structure, which can effectively improve the weather-resistibility of the disc to extend the lifetime and the conserving time of the disc.