Invention Grant
- Patent Title: Optical recording medium and recording film material
- Patent Title (中): 光记录介质和记录膜材料
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Application No.: US12010163Application Date: 2008-01-22
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Publication No.: US07960006B2Publication Date: 2011-06-14
- Inventor: Hiroshi Shingai , Tatsuya Kato , Masanori Kosuda , Hiroshi Takasaki , Hideki Hirata , Hajime Utsunomiya
- Applicant: Hiroshi Shingai , Tatsuya Kato , Masanori Kosuda , Hiroshi Takasaki , Hideki Hirata , Hajime Utsunomiya
- Applicant Address: JP Tokyo
- Assignee: TDK Corporation
- Current Assignee: TDK Corporation
- Current Assignee Address: JP Tokyo
- Agency: Oliff & Berridge, PLC
- Priority: JP2007-013138 20070123; JP2007-341231 20071228
- Main IPC: B32B3/02
- IPC: B32B3/02

Abstract:
A next-generation optical recording medium has two or more information layers which include a translucent information layer. The translucent information layer has a recording film and an interface layer, provided adjacent to the recording film on the side of the light incident surface. The recording film is made of a phase change material having SbxTeyGez elements and elemental ratios. Y satisfies 5≦y≦15 and z satisfies 5≦z≦15. When In having an elemental ratio of a is further added and x+y+z+a=100 holds, a satisfies 4≦a≦15. The interface layer comprises of ZrO2—Cr2O3 film thickness of which is in a range of from 2 nm to 10 nm. When ZrO2:Cr2O3═C:D (mol %), the compositional ratios ZrO2 and Cr2O3 in the ZrO2—Cr2O3 film, holds, the C satisfies 20≦C≦90, and the D satisfies 10≦D≦80, and the C and the D satisfy C+D=100. The ZrO2 is stabilized ZrO2 which contains Y2O3, when ZrO2:Y2O3=(100−X):X (mol %), the compositional ratios ZrO2 and Y2O3 in the stabilized ZrO2, holds, the X satisfies 2≦X≦10.
Public/Granted literature
- US20080175125A1 Optical recording medium and recording film material Public/Granted day:2008-07-24
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