METHOD AND APPARATUS FOR MANUFACTURE OF LAMINATED OPTICAL DISC

Title:

METHOD AND APPARATUS FOR MANUFACTURE OF LAMINATED OPTICAL DISC

Document Type and Number:

WIPO Patent Application WO/1997/040494

Kind Code:

A1

Abstract:

An adhesive layer (AS) is formed between a first substrate (6) and a second substrate (9) and the first substrate (6) and the second substrate (9) are joined to manufacture a disc (OD). Various conditions such as the temperature (T) are controlled in accordance with the thickness ('DELTA'D) of the adhesive layer of the manufactured optical disc to vary the viscosity ('nu') of the adhesive (PP) depending on the respective processes. High quality optical discs can be stably manufactured and, further, the operation efficiency of a manufacturing apparatus can be improved. The laminated optical disc (OD) whose adhesive layer (AS) is free from voids can be stably manufactured.

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Inventors:

MIYAMOTO HISAKI (JP)
INOUE KIYOSHI (JP)
ITOU HIROKAZU (JP)
KOZONO TOSHIKAZU (JP)

Application Number:

PCT/JP1997/001345

Publication Date:

October 30, 1997

Filing Date:

April 18, 1997

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
MIYAMOTO HISAKI (JP)
INOUE K (JP)
ITO HIROKAZU (JP)
KOZONO TOSHIKAZU (JP)

International Classes:

B29C65/00; B29C65/48; B29D17/00; G11B7/26; B29C35/08; (IPC1-7): G11B7/26

Foreign References:

JPS63239628A	1988-10-05
JPH0237543A	1990-02-07
JPS61292242A	1986-12-23
JPS63124248A	1988-05-27
JPH0520713A	1993-01-29
JPH04139630A	1992-05-13

Other References: