Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1992-10-22
1994-01-11
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
RE0345067
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: 4430401 (1984-02-01), Wilkinson
patent: 4619804 (1986-10-01), Leonard et al.
patent: 5119359 (1992-06-01), Miyagi et al.
Richard L. Wilkinson, CD Quality Control:Quality Starts at Mastering, 1992, The Entire Document.
Del Mar Bruce E.
Dobbin Robert B.
Loeppky David G.
Norton James R.
Del Mar Avionics
English W. D.
Leimbach James D.
Richardson Robert L.
LandOfFree
Product and process for manufacturing an optical disc master does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Product and process for manufacturing an optical disc master, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Product and process for manufacturing an optical disc master will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1623029