| 摘要 |
A digital versatile disc ("DVD") (20) for storing digital or digitized information that includes two sub-discs. Each sub-disc has an outer peripheral edge (28, 38), a top surface (34, 44), a bottom surface (36, 46), and a bore (30, 40) having a second peripheral edge (32, 42). The two sub-discs are bonded together by a layer of dry film adhesive (50) which is in contact with the bottom surface (36) of the first sub-disc (24) and the top surface (44) of the second sub-disc (26). The layer of dry film adhesive is spaced a distance (D) from the second peripheral edges of the bores of the sub-discs. A weld (80) located along the peripheral edges of the bores of the sub-discs provides bonding and structural support to the DVD. A hub or central area (85) which is substantially free of any dry film adhesive is located between the weld and the layer of dry film adhesive. The use of a dry film adhesive to bond the component parts of the DVD eliminates many of the deficiencies of hot-melt and UV-curable adhesive bonding methods, particularly the problem of entrapping air in the adhesive. In an alternative form of the invention, multiple layers of adhesive are used and a means for displaying decoration is positioned between the first (103, 106) and second (104, 108) sub-discs. |
