Method for making optically readable media containing embossed i

Details Method for making optically readable media containing embossed i Method for making optically readable media containing embossed i

1995-04-10

1996-09-03

Engel, James

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

1562755, B32B 3100

Patent

active

055520090

ABSTRACT:
A method for making an optically readable medium containing a relief information track comprising the sequential steps of
(a) laminating a dry photohardenable film to a surface of a transparent dimensionally stable substrate;
(b) embossing the exposed surface of the photohardenable film with the relief information track by applying thereto under pressure a stamper die containing a reverse relief image of the information track;
(c) passing actinic radiation through the transparent substrate and the photohardenable film to effect hardening of the photohardenable film while it is contact with the stamper die; and
(d) separating the stamper die from the embossed photohardened film;
The embossed film of the medium is made reflective by applying a reflective layer to either the photohardenable film prior to embossing or to the photohardened film subsequent to embossing.

REFERENCES:
patent: 5273598 (1993-12-01), Higasihara et al.

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