Title:
OPTICAL RECORDING MEDIUM
Document Type and Number:
Japanese Patent JP2002056573
Kind Code:
A
Abstract:
To provide an optical recording medium having a mask layer using a thermochromic material which shows absorption at the wavelength in the order of 400 nm to respond the next-generation blue-violet semiconductor laser or blue laser, which reversibly changes its transmittance for light at the wavelength of the irradiating light with temperature and which is composed of two components of an electron donating chromogenic compound and an electron accepting developer.
Higher density in the next-generation optical disk which uses a blue-violet semiconductor laser is made possible by using an electron donating chromogenic compound showing absorption in the wavelength region of the blue-violet semiconductor laser for a mask layer 4.
Inventors:
TSUJITA KOJI
UENO ICHIRO
HATAKEYAMA MASARU
SAWANO BUNJI
KUMAGAI YOJIRO
UENO ICHIRO
HATAKEYAMA MASARU
SAWANO BUNJI
KUMAGAI YOJIRO
Application Number:
JP2000245365A
Publication Date:
February 22, 2002
Filing Date:
August 11, 2000
Export Citation:
Assignee:
VICTOR COMPANY OF JAPAN
YAMAMOTO CHEMICALS INC
YAMAMOTO CHEMICALS INC
International Classes:
B41M5/26; C09B11/02; C09B11/26; C09B11/28; C09B67/20; G11B7/24; G11B7/24065; G11B7/24067; (IPC1-7): G11B7/24; B41M5/26
Attorney, Agent or Firm:
Nihei Masataka
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