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Patent Searching and Data


Title:
OPTICAL RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2008/029856
Kind Code:
A1
Abstract:
Provided is an optical recording medium having an excellent jitter characteristic and preferable recording/reproduction characteristic and capable of performing significantly high-density recording. An optical recording medium (20) includes: a substrate (21) on which a guide groove is formed, a layer (23) having a light reflection function, a recording layer (22) containing a predetermined porphyrin compound as a main content, and a cover layer (24) capable of transmitting a recording/reproduction light coming into the recording layer (22) which are layered in this order on the substrate (21). When the guide groove portion farther from the plane where the recording/reproduction light beam comes into the cover layer (24) serves as the recording groove portion, the reflected light intensity at the recording pit portion formed in the recording groove portion is higher than the reflected light intensity when no recording is performed at the recording groove portion.

Inventors:
KUBO MASAE (JP)
KIYONO KENJIROU (JP)
NAKAMURA TAKESHI (JP)
Application Number:
JP2007/067336
Publication Date:
March 13, 2008
Filing Date:
September 05, 2007
Export Citation:
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Assignee:
MITSUBISHI KAGAKU MEDIA CO LTD (JP)
KUBO MASAE (JP)
KIYONO KENJIROU (JP)
NAKAMURA TAKESHI (JP)
International Classes:
B41M5/26; G11B7/244; G11B7/249; G11B7/2492; G11B7/2578; G11B7/24079; G11B7/253; G11B7/2533; G11B7/257; G11B7/258; G11B7/259
Foreign References:
JP2004160742A2004-06-10
JP2003300983A2003-10-21
JPH11221964A1999-08-17
JP2001138633A2001-05-22
JP2001273672A2001-10-05
JP2006256295A2006-09-28
JPH0363943A1991-03-19
JPH02132656A1990-05-22
JPS57501980A1982-11-04
JP2002301870A2002-10-15
JPH04182944A1992-06-30
JP2004030864A2004-01-29
JP2003266954A2003-09-25
JP2001331936A2001-11-30
JP2005504649A2005-02-17
JPH069107A1994-01-18
JP2004160742A2004-06-10
JP2006241738A2006-09-14
Other References:
See also references of EP 2065210A4
PROCEEDINGS OF INTERNATIONAL SYMPOSIUM ON OPTICAL MEMORY, (U.S.A.), vol. 4, 1991, pages 99 - 108
PROCEEDINGS OF SPIE, (U.S.A.), vol. 4342, 2002, pages 168 - 177
"Nikkei Electronics", 2003, NIKKEI BP INC.
JAPANESE JOURNAL OF APPLIED PHYSICS, vol. 42, 2003, pages 1056 - 1058
HEITARO NAKAJIMA; HIROSHI OGAWA: "Konpakuto Disuku Dokuhon", 1996, OHMSHA, LTD., pages: 168
JAPANESE JOURNAL OF APPLIED PHYSICS, vol. 42, 2003, pages 914 - 918
JAPANESE JOURNAL OF APPLIED PHYSICS, vol. 39, 2000, pages 775 - 778
JAPANESE JOURNAL OF APPLIED PHYSICS, vol. 42, 2003, pages 912 - 914
BIOORG. MED. CHEM., vol. 10, 2002, pages 3013 - 3021
ALPHONSUS V. POCIUS; HIROSHI MIZUMACHI; HIROKUNI ONO: "Setchakuzai To Setchaku Gjjutsu NyĆ¼mon", 1999, THE NIKKAN KOGYO SHINBUN LTD.
ALPHONSUS V. POCIUS; HIROSHI MIZUMACHI; HIROKUNI ONO: "Setchakuzai To Setchaku GjjutsuNytmon", 1999, THE NIKKAN KOGYO SHINBUN LTD.
Attorney, Agent or Firm:
NAITO, Teruo (7-13 Nishi-Shimbashi,1-chome, Minato-ku, Tokyo 03, JP)
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