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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 (31-19, Shiba 5-chome, Minato-k, Tokyo 14, 1080014, JP)
久保 正枝 (〒14 東京都港区芝5丁目31番19号 三菱化学メディア株式会社内 Tokyo, 1080014, JP)
KIYONO, Kenjirou (31-19, Shiba 5-chome, Minato-k, Tokyo 14, 1080014, 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. (31-19, Shiba 5-chome Minato-k, Tokyo 14, 1080014, JP)
三菱化学メディア株式会社 (〒14 東京都港区芝5丁目31番19号 Tokyo, 1080014, JP)
KUBO, Masae (31-19, Shiba 5-chome, Minato-k, Tokyo 14, 1080014, JP)
久保 正枝 (〒14 東京都港区芝5丁目31番19号 三菱化学メディア株式会社内 Tokyo, 1080014, 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:
JP2004160742A
JP2003300983A
JPH11221964A
JP2001138633A
JP2001273672A
JP2006256295A
JPH0363943A
JPH02132656A
JPS57501980A
JP2002301870A
JPH04182944A
JP2004030864A
JP2003266954A
JP2001331936A
JP2005504649A
JPH069107A
JP2004160742A
JP2006241738A
Other References:
See also references of EP 2065210A1
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. page 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 Nyümon', 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 (Shin-ei Patent Office, 7-13 Nishi-Shimbashi,1-chome, Minato-ku, Tokyo 03, 1050003, JP)
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