| 摘要 |
A dual-layer DVD disc that does not require a stamping step (typically as pa rt of the 2P prior art manufacturing process) during its manufacture. A polycarbonate substrate (64) is molded and coated with a semireflective data layer (66), in the usual way. A PMMA substrate (60) is molded and coated on its surface (60a) with a fully reflective data layer (62). Adhesive (68) is placed on the semireflective data layer (66), and the fully reflective data layer (62) is transferred from its PMMA substrate (60) to the polycarbonate substrate (64). A force is applied in the direction of the arrows (72) on th e PMMA to separate it from the remaining structure. The polycarbonate substrat e thus ends up with two data layers in conformance with the DVD specifications , and the PMMA substrate can even be recycled for another use. |
