Invention Grant
- Patent Title: Optical information recording medium having super-resolution film
- Patent Title (中): 具有超分辨率薄膜的光学信息记录介质
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Application No.: US14533378Application Date: 2014-11-05
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Publication No.: US09105278B2Publication Date: 2015-08-11
- Inventor: Hideharu Tajima , Go Mori , Yasuhiro Harada , Masaki Yamamoto , Hirohisa Yamada , Masahito Konishi
- Applicant: Sharp Kabushiki Kaisha , Memory-Tech Corporation
- Applicant Address: JP Osaka JP Ibaraki
- Assignee: Sharp Kabushiki Kaisha,Memory-Tech Corporation
- Current Assignee: Sharp Kabushiki Kaisha,Memory-Tech Corporation
- Current Assignee Address: JP Osaka JP Ibaraki
- Agency: Keating & Bennett, LLP
- Priority: JP2010-134198 20100611
- Main IPC: G11B7/24
- IPC: G11B7/24 ; G11B7/013 ; G11B7/007 ; G11B7/24085 ; G11B7/24038 ; G11B7/24088 ; G11B7/00 ; G11B7/26

Abstract:
An optical information recording medium has a first information recording layer (20) and a second information recording layer (40) each of which includes (i) a group of pre-pits (31, 51) constituting marks (32, 52) and spaces (33, 53) and (ii) a super-resolution film (23, 43), the marks (32, 52) and the spaces (33, 53) having different lengths, an average length of a smallest mark that is smallest in length and a smallest space that is smallest in length being less than or equal to a resolution limit of a reproduction optical system for reproducing information recorded on the first information recording layer (20) and the second information recording layer (40), the group of pre-pits (31, 51) being formed so that a push-pull signal for the reproduction optical system to reproduce the information recorded by the group of pre-pits is negative in polarity. This provides an inexpensive and high-capacity multilayer optical information recording medium based on a super-resolution technology.
Public/Granted literature
- US20150055445A1 OPTICAL INFORMATION RECORDING MEDIUM Public/Granted day:2015-02-26
Information query
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