Disc for optical recording and reproduction of information - uses ultraviolet sensitive adhesive to bond recording material layer to substrates and to each other.

摘要

The optical recording disc has outer solid substrates (1) that each support a layer of recording material (2). The substrates can be of optical glass or plastic and the recording material can be of a photomagnetic substance, such as Tb.Fe, Gd.Co, GdTbFe. The recording layers are bonded to the surface of the substrates using a two component adhesive that hardens when exposed to ultraviolet light. The adhesive layer is thick enough to provide bonding of the recording layers to each and also the outer edges of the substrate to each other. ADVANTAGE - Provides rapid bonding of disc components. Improved production rate.