Optical recording medium, optical recording method

专利名称：Optical recording medium, optical recording

method, optical reproducing method,optical recording apparatus, and opticalreproducing apparatus

发明人：Morio Nakatani,Satoshi Sumi,Masahiro

Nakata

申请号：US11218788申请日：20050906公开号：US07719953B2公开日：20100518

专利附图：

摘要：A substrate in which a minute ruggedness structure including columnarprojections is formed in a track shape is prepared. The pitch of the columnar projectionsof the ruggedness structure is set such that a plurality of the columnar projections iswithin a beam spot. A flat portion is disposed between adjacent tracks. A reflecting layeris formed on the substrate. The flat portion becomes a mirror surface because of theformation of the reflecting layer. The reflectance of the ruggedness structure becomessignificantly lower than the reflectance of the flat portion. When the ruggednessstructure is irradiated with high-power laser light, a portion of the ruggedness structureis raised to a reflecting layer side and flattened. At this time, reflectance of the raisedportion becomes higher than reflectance of a non-raised portion. When a track includingthe ruggedness structure is irradiated with high-power pulse laser light, signal recordingbased on a change in reflectance is possible.

申请人：Morio Nakatani,Satoshi Sumi,Masahiro Nakata

地址：Shijonawate JP,Gifu JP,Ohgaki JP

国籍：JP,JP,JP

代理机构：McDermott Will & Emery LLP

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