Method for manufacturing optical memory disc

Details Method for manufacturing optical memory disc Method for manufacturing optical memory disc

1983-06-23

1984-07-03

Hoffman, James R.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

477 16, 477164, G01D 1534

Patent

active

044577940

ABSTRACT:
Proposed is a method for manufacturing an optical memory disc having a pregrooved substrate and a recording film on the pregrooved substrate. In the step of depositing the recording film on the pregrooved substrate, light is incident on the pregrooved substrate, and at least one of exposure amounts of light reflected by and light transmitted through the pregrooved substrate and the recording film while the recording film is being deposited on the pregrooved substrate is measured. When one of the exposure amounts of light reflected by and light transmitted through the pregrooved substrate and the recording film has reached the corresponding preset exposure amount, the deposition of the recording film is stopped.

REFERENCES:
patent: 3971874 (1976-07-01), Ohta et al.
patent: 4397923 (1983-08-01), Yasuda et al.

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