# US 2014/0193601 A1 · Method for manufacturing multilayer structure sheet, and optical information recording medium

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- Number: US 2014/0193601 A1
- Document ID: US20140193601A1
- Status: Published application
- Kind: A1
- Application number: 14/204,896
- Filed: 2014-03-11
- Published: 2014-07-10
- Earliest claimed: 2011-09-13
- Assignees: FUJIFILM Corporation
- Applicants: FUJIFILM Corporation
- Inventors: Tatsuo MIKAMI; Hidehiro MOCHIZUKI; Akiko HENMI
- Web page: https://patentgrep.com/patent/US20140193601A1

## CPC

- G11B 7/26: Apparatus or processes specially adapted for the manufacture of record carriers
- G11B 7/24018: Laminated discs (G11B7/24015 takes precedence)
- G11B 7/24038: Multiple laminated recording layers
- Y10T 428/1476: Release layer
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A method for manufacturing a multilayer structure sheet for manufacturing an optical information recording medium having a multilayer structure with a plurality of recording layers comprises: an adhesive layer forming step of forming an adhesive layer on a first release sheet to obtain a first sheet; a recording layer forming step of forming a recording layer containing a polymer on a second release sheet or a release assisting layer formed on the second release sheet to obtain a second sheet; a laminating step of laminating the recording layer of the second sheet on the adhesive layer of the first sheet to obtain a third sheet in which the second sheet is laid on the first sheet; and a heating step of heating the second sheet.

## Claims

### Claim 1

A method for manufacturing a multilayer structure sheet for manufacturing an optical information recording medium having a multilayer structure with a plurality of recording layers, the method comprising:
an adhesive layer forming step of forming an adhesive layer on a first release sheet to obtain a first sheet;
a recording layer forming step of forming a recording layer containing a polymer on a second release sheet or a release assisting layer formed on a second release sheet to obtain a second sheet; and
a laminating step of laminating the recording layer of the second sheet on the adhesive layer of the first sheet to obtain a third sheet in which the second sheet is laid on the first sheet,
wherein the method further comprises:
a heating step of heating the second sheet.

### Claim 2 (depends on 1)

The method for manufacturing a multilayer structure sheet according to claim 1, wherein the heating step is performed before the laminating step.

### Claim 3 (depends on 1)

The method for manufacturing a multilayer structure sheet according to claim 1, further comprising a cooling step, performed after the heating step, of cooling the heated second sheet.

### Claim 4 (depends on 3)

The method for manufacturing a multilayer structure sheet according to claim 3, wherein the cooling step comprises placing the second sheet in a temperature lower than ambient temperature.

### Claim 5

A method for manufacturing a multilayer structure sheet for manufacturing an optical information recording medium having a multilayer structure with a plurality of recording layers, the method comprising:
an adhesive layer forming step of forming an adhesive layer on a first release sheet to obtain a first sheet;
a recording layer forming step of forming a recording layer containing a polymer on a second release sheet or a release assisting layer formed on a second release sheet to obtain a second sheet; and
a laminating step of laminating the recording layer of the second sheet on the adhesive layer of the first sheet to obtain a third sheet in which the second sheet is laid on the first sheet,
wherein the method further comprises:
a heating step of heating the third sheet.

### Claim 6 (depends on 5)

The method for manufacturing a multilayer structure sheet according to claim 5, further comprising a removing step, performed during the heating step, of removing the second release sheet.

### Claim 7 (depends on 5)

The method for manufacturing a multilayer structure sheet according to claim 5, further comprising a cooling step, performed after the heating step, of cooling the heated third sheet.

### Claim 8 (depends on 7)

The method for manufacturing a multilayer structure sheet according to claim 7, wherein the cooling step comprises placing the third sheet in a temperature lower than ambient temperature.

### Claim 9 (depends on 1)

An optical information recording medium manufactured by using a multilayer structure sheet manufactured by the method for manufacturing a multilayer structure sheet according to claim 1.