Stamper for replicating high-density data recording disks

Details Stamper for replicating high-density data recording disks Stamper for replicating high-density data recording disks

1985-06-18

1988-02-09

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Surface deformation means only

204 6, 425810, 425DIG30, 428600, 430326, B32B 300

Patent

active

047239034

ABSTRACT:
Herein disclosed are a stamper for replicating a high-density data recording disk, wherein there is formed on a substrate a multi-layered metal film, in which a plurality of metals of different kinds are laminated and which has a thickness equal to the depth of a pit, by an etching technique having a selectivity for the kinds of metals and a process for producing that stamper. Since one or more pits having different depths are formed very precisely, the recording density is increased, and the quality of a readout data signal is improved while dispensing with the plating step. As a result, there can be attained an effect that the productivity and economy can be improved.

REFERENCES:
patent: 3532587 (1970-10-01), Ungar et al.
patent: 4259433 (1981-03-01), Mizobuchi et al.
patent: 4482511 (1984-11-01), Komatsubara
patent: 4495026 (1985-01-01), Herberg
patent: 4519872 (1985-05-01), Anderson, Jr. et al.

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