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| Manufacturers Information > Disc Bonding |
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Problem of the disc bonding of the outer edge of the disc In the WG2 meeting, the following problems of the disc on the market was reported. There were many discs on the market where the glue protrudes from the outer edge of the disc. In one case, the protruded glue might be not or partially cured as shown in Figure 1. In another case, the protruded glue sticked out from the outer edge of the disc onto the laser entry surface like a burr as shown in Figure 2.
When a tray loader was used, it was possible that the clamping would fail because the disc outer edge was sticking to the tray. When a slot-in type loader was used, it was possible that the disc was also not loaded normally because the uncured glue was sticking to the guide shaft or driver roller. When the disc with burr was loaded, the loader might get scratched. Therefore WG2 made the new Annex in the DVD Book for the outer edge bonding condition, which recommended for disc that the glue protruded from the disc outer edge was fully cured and there was no protruded burr that exceeded the laser entry surface. ____________________________________________________ |
