Multilayer optical disc and method of making same

Details Multilayer optical disc and method of making same Multilayer optical disc and method of making same

1996-06-06

1998-05-26

McPherson, John A.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making named article

430945, 3692754, 369284, G11B 724, G11B 726

Patent

active

057562652

ABSTRACT:
A method of making a multilayer optical disc of a type formed by laminating a plurality of signal layers each having a spiral or concentric pattern of a series of pits so that information can be read by irradiating any one of the signal layers with a playback laser from a surface of a substrate of the optical disc and reading waveforms reproduced therefrom. A master disc having a pit pattern formed thereon by exposing to a modulated exposure light pulse train is prepared for each of signal recorded layers. Based on this master disc, a mold is then prepared having a pit pattern which is a replica of the pit pattern on the master disc. Using the molds, respective replicas are formed and bonded together in face-to-face relation to thereby provide the multilayer optical disc. The series of pits on each signal layers in the master disc has a pit width or a pit length so chosen as to permit a signal reproduced from each signal layer to represent a waveform substantially identical with that of a signal which has been recorded.

REFERENCES:
patent: 4450553 (1984-05-01), Holster

Affiliated with

Also associated with

Rating

Multilayer optical disc and method of making same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multilayer optical disc and method of making same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multilayer optical disc and method of making same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1958677