Optical recording medium having disconnected lands and grooves f

Details Optical recording medium having disconnected lands and grooves f Optical recording medium having disconnected lands and grooves f

1998-08-28

2000-10-24

Dinh, Tan

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

3692754, B32B 302, G11B 724

Patent

active

061364029

ABSTRACT:
An optical recording medium having a disconnected land and/or a groove thereby forming a control signal portion. The control signal portion may have therein a clock signal. The disconnect is formed by wobbling a laser beam while applying the laser beam to a photoresist layer formed on an original glass disk to cut circumferential grooves therein. The beam is wobbled in the radial direction to form a disconnect in the circumferential groove and simultaneously therewith a mark to disconnect a land between grooves.

REFERENCES:
patent: 4879707 (1989-11-01), Getreuer et al.
patent: 5084860 (1992-01-01), Maeda et al.
patent: 5444682 (1995-08-01), Yamada et al.

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