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Patent Searching and Data


Title:
OPTICAL RECORDING MEDIUM
Document Type and Number:
Japanese Patent JP2007172683
Kind Code:
A
Abstract:

To enhance recording sensitivity of an optical recording medium having two dye recording layers using a blue laser as recording and reproducing light.

In the optical recording medium 100 having a first recording layer 102 in which information is recorded by using a laser beam 120 (the blue laser) radiated from a light transmissible first substrate 101 side and a second recording layer 106 in which information is recorded with recording sensitivity approximately equal to that of the first recording layer 102 by using the blue laser transmitted by the first recording layer 102, the reflectance (R01) of a recording mark formed on the first recording layer 102 is lower than the reflectance (R00) of a part without the recording mark (R00>R01) and the reflectance (R11) of a recording mark formed on the second recording layer 106 is higher than the reflectance (R10) of a part without the recording mark (R10<R11).


Inventors:
ENDOU NOBUMASA
ISHIZAKI OSAMU
Application Number:
JP2005365107A
Publication Date:
July 05, 2007
Filing Date:
December 19, 2005
Export Citation:
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Assignee:
HITACHI MAXELL
International Classes:
G11B7/24027; G11B7/24035; G11B7/24038; G11B7/244; G11B7/2467; G11B7/247; G11B7/249
Attorney, Agent or Firm:
Jiro Kobe