Process for manufacturing an optical disc master

Details Process for manufacturing an optical disc master Process for manufacturing an optical disc master

1990-02-20

1992-03-24

Richardson, Robert L.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

264 11, 264 27, 369283, 369286, G11B 700

Patent

active

050994697

ABSTRACT:
The invention discloses a simplified four step process for making an optical disc master or alternatively a WORM disc by first making or obtaining a transparent polymer disc with a tracking groove of desired geometry molded therein, then spin coating an optically active lamina on the grooved side of the disc, then recording data on said polymer disc with groove controlled and tracked laser means by ablating active lamina, forming pits, the shape of which is determined by the groove geometry and finally depositing a conductive and reflective lamina over the pitted active lamina. To change the OD master to an OD WORM, a protective cover is added to the electrically conductive and optically reflective lamina.

REFERENCES:
patent: 4619804 (1986-10-01), Leonard et al.

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