| 摘要 |
Method for producing pressing dies, particularly for the manufacture of optically read discs, consisting, by means of a standard commercial apparatus, in recording in the form of micro-pits (14), a signal corresponding to information coded in a heat-sensitive resin layer (11) deposited on a rigid substrate (10) and able to be etched under the effect of radiation (f) issuing from a laser diode, the said layer being covered previously with a thin reflective metal coating (12). �<??>This method consists in removing the reflective coating and the protective layer so as to uncover the micro-pits with a view to constructing a master disc, in depositing a thin metal coating on the resin layer so as to match the profile of the micro-pits, then in depositing a final metal layer on the coating to form an impression die containing micro-reliefs corresponding to the micro-pits and finally in subsequently pressing on the said die the optical discs or the like to be produced. |
