of the disc bonding of the outer edge of the disc
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.
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