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Title:
OPTICAL RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2003/098619
Kind Code:
A1
Abstract:
A rewritable optical recording medium having a plurality of recording layers, wherein recording characteristics and reproducing characteristics for these recording layers are enhanced. The optical recording medium comprises an L1 recording layer (30) and an L0 recording layer (20) provided on a support substrate (11), and a transparent intermediate layer (12) provided between them, wherein the L0 recording layer (20) comprises a recording film (24), a first dielectric film (25) provided in contact with the recording film (24) and on a light incident surface (13a) side, a second dielectric film (23) provided in contact with the recording film (24) and on a support substrate (11) side, a transparent radiation film (26) provided in contact with the first dielectric film (25) and on the light incident surface (13a) side, a translucent reflection film (22) provided in contact with the second dielectric film (23) and on a support substrate (11) side, and a base protection film (21) provided between the translucent reflection film (22) and the transparent intermediate layer (12), the thickness of the second dielectric film (23) being less than 15 nm, the thickness of the translucent reflection film (22) being less than 20 nm.

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Inventors:
MIZUSHIMA TETSURO (JP)
YOSHINARI JIRO (JP)
Application Number:
PCT/JP2003/005089
Publication Date:
November 27, 2003
Filing Date:
April 22, 2003
Export Citation:
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Assignee:
TDK CORP (JP)
MIZUSHIMA TETSURO (JP)
YOSHINARI JIRO (JP)
International Classes:
G11B7/24; G11B7/24038; G11B7/24062; G11B7/258; G11B7/2585; G11B7/259; (IPC1-7): G11B7/24
Foreign References:
JPH03241539A1991-10-28
JPH07130001A1995-05-19
JPH11283275A1999-10-15
JP2002074747A2002-03-15
JP2000339762A2000-12-08
JPH11328732A1999-11-30
JPH05242525A1993-09-21
JPH0373436A1991-03-28
JP2002074742A2002-03-15
JP2002117578A2002-04-19
JP2001195777A2001-07-19
JPH10293945A1998-11-04
JP2002025115A2002-01-25
JP2001028148A2001-01-30
JP2000207774A2000-07-28
JP2003045085A2003-02-14
Other References:
See also references of EP 1515321A4
Attorney, Agent or Firm:
Oishi, Koichi (Yusen-Awajicho Building 4-1, Kandaawajicho 1-chom, Chiyoda-ku Tokyo, JP)
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