US 2001/0048977 A1 · Manufacturing method for multilayer fluorescent information carriers

Abstract

An information layer for an optical information storage medium is formed in a centrifuge. A photopolymerizable composition is applied to a solid base having a relief pattern, and a flexible, transparent film layer is applied on top of the composition. The three are spun in a centrifuge to cause a thin, even distribution of the photopolymerizable composition, which is photopolymerized. The resulting replica is separated from the relief pattern and has a fluorescent material applied thereto. Alternatively, the replica has a non-fluorescent material applied thereto, and the non-fluorescent material is made fluorescent through diffusion. Multiple information layers thus formed can be glued together to form a multilayer optical information storage medium.

Claims37

Dependent claims

A method of making an optical information storage medium, the method comprising:

(a) disposing a polymerizable composition between a base and a covering layer, at least one of the base and the covering layer having a first relief pattern on a side facing the polymerizable composition;
(b) spinning the base, the polymerizable composition and the covering layer in a centrifuge to distribute the polymerizable composition;
(c) polymerizing the polymerizable composition while the polymerizable composition is distributed between the base and the covering layer to form a polymerized layer having a second relief pattern corresponding to the first relief pattern;
(d) separating the polymerized layer from the first relief pattern;
and
(e) filling the second relief pattern with a fluorescent information storage material.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

09/761,647Filed 18 Jan 2001

Priority

18 Jan 2000

Published

6 Dec 2001

Term ends

Not estimatedThe source records don’t support an estimate.

Classification17 codes

G03F 7/0017
Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g.…
B29C 41/045
By rotating a mould around its axis of symmetry: the axis being placed vertically, e.g. spin casting
B29D 17/005
Producing carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records ; Producing record…:…
G03F 7/162
Coating processes; Apparatus therefor: coating on a rotating support, e.g. using a whirler or a spinner

Manufacturing method for multilayer fluorescent information carriers

Life of this patent

Manufacturing method for multilayer fluorescent information carriers

Life of this patent

Abstract

Claims37