Method of manufacturing dies for pressing optical disks

Details Method of manufacturing dies for pressing optical disks Method of manufacturing dies for pressing optical disks

1993-01-19

1994-05-17

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making named article

430321, 430945, 430273, 430275, 430256, 205 68, C25D 110

Patent

active

053127188

ABSTRACT:
An optical disk die is manufacture from a laminated disk which includes a substrate, an overlying heat sensitive layer, a reflective layer, and a final output protective layer. A laser beam forms micro-pits in the heat sensitive layer. These micro-pits become exposed after removal of the protective and reflective layers. A thin metallic coating is deposited over the surface of the pitted heat sensitive layer wherein the contours of the micro-pits are followed. A thicker second metallic layer is deposited over the first metallic layer and has an interface with the first metallic layer which duplicates a pattern of the micro-pits. Finally, the deposited second layer is separated from the remainder of the laminated disk thereby forming a die having the micro-pit pattern therein.

REFERENCES:
patent: 5004660 (1991-04-01), Van Andel et al.
patent: 5166014 (1992-11-01), Ledieu
English language abstract of JP 4-21940, Omori et al., "Production of Master Disk for Optical Disk", Jan. 1992.

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