Invention Grant
- Patent Title: Multilayer optical information recording medium, optical head, and optical drive
- Patent Title (中): 多层光信息记录介质，光头和光驱
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Application No.: US11883385Application Date: 2006-11-30
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Publication No.: US07940628B2Publication Date: 2011-05-10
- Inventor: Shigeyoshi Misawa , Shigeru Oouchida
- Applicant: Shigeyoshi Misawa , Shigeru Oouchida
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Dickstein Shapiro LLP
- Priority: JP2005-349202 20051202; JP2006-016382 20060125
- International Application: PCT/JP2006/324406 WO 20061130
- International Announcement: WO2007/064040 WO 20070607
- Main IPC: G11B7/20
- IPC: G11B7/20
Abstract:
A disclosed optical recording medium includes multiple recording layer units in each of which one or more recording layers and one or more middle layers are stacked alternately; and one or more spacer layers. In the disclosed optical recording medium, the recording layer units and the spacer layers are stacked alternately in a depth direction of the optical recording medium.
Public/Granted literature
- US20080165652A1 Multilayer Optical Information Recording Medium, Optical Head, and Optical Drive Public/Granted day:2008-07-10
Information query
