Bonding

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The process of gluing two DVD substrates together to form a finished disc. This process is critical to the quality of a DVD. Improperly bonded discs could become delaminated. The thickness of the bonding layer is critical with dual layer DVDs (DVD-9 or DVD-18), as it provides the separation between layer 0 and layer 1. Centering alignment of the 2 substrates is critical in order to prevent eccentricity or shrinking of the center hole size. Hot melt glue is used in some low-cost DVD manufacturing operations, but is not useable for dual layer discs. Ultraviolet cured bonding resin is used by high quality DVD manufacturers.

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