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Patent Searching and Data


Title:
OPTICAL RECORDING MEDIUM AND MANUFACTURING METHOD THEREOF
Document Type and Number:
Japanese Patent JP2003272237
Kind Code:
A
Abstract:

To provide an optical recording medium capable of suppressing uneven film thickness of an intermediate layer among multi-optical recording layers and also suppressing occurrence of problems such as effect of deformation of a transposition substrate and dust or burr or the like and to provide a manufacturing method thereof.

The optical recording medium has at least two optical recording layers (11, 13) stacked via an intermediate layer 12 at least on one side of a medium substrate 10, and a light transmission layer 14 placed on the optical recording layers, and emitting a light to the optical recording layers (11, 13) through the light transmission layer 14 records/reproduces information. The intermediate layer 12 includes at least one layer of ultraviolet ray curing resin film filmed in advance and the film is cured while forming a rugged shaped corresponding to recording pits or a rugged shape (12p) acting like guide grooves on the surface.


Inventors:
YAMAZAKI TAKESHI
YUKIMOTO TOMOMI
Application Number:
JP2002079549A
Publication Date:
September 26, 2003
Filing Date:
March 20, 2002
Export Citation:
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Assignee:
SONY CORP
International Classes:
G11B7/26; (IPC1-7): G11B7/24; G11B7/26
Attorney, Agent or Firm:
Takahisa Sato