Process for producing information recording medium

Details Process for producing information recording medium Process for producing information recording medium

1988-10-21

1990-02-13

Wityshyn, Michael

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156290, 1563084, 1565832, 346137, 360135, 428 65, B29C 6508, B32B 3120, G11B 726

Patent

active

049003801

ABSTRACT:
A process for producing an information recording medium such as an optical disc comprises the steps of: putting a disc-shaped resin film having a hole at its central part upon a surface of a recording layer-side of a disc-shaped resin substrate having a hole at its center; and joining the resin film to the resin substrate by thermal welding in an outer-side non-recording zone of the substrate and by ultrasonic welding in an inner-side non-recording zone of the substrate.

REFERENCES:
patent: 3369954 (1968-02-01), Fener
patent: 4670072 (1987-06-01), Pastor et al.
patent: 4785444 (1988-11-01), Nakane et al.

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