OPTISCHE KARTEN UND VERFAHREN ZU IHRER HERSTELLUNG.

摘要

In the process for preparing an optical data card a light reflective layer (4) is formed on one surface of a protective film (5); a photoresist layer (7) is formed on the light reflective layer; the resulting laminate is subjected to photoetching to form, in said light reflective layer, an optical information pattern (3) composed of information pits. Then the protective film having the light reflective layer having the optical information pattern thus formed is bonded to a card substrate (1) so that the light reflective layer and the card substrate are in face to face relationship. In an alternative embodiment, the layers (4) and (7) are applied to the card substarte (1) and processed thereon before bonding with the protective film (5).