Invention Grant
- Patent Title: Optical disc recording medium and method of manufacturing optical disc
- Patent Title (中): 光盘记录介质及其制造方法
-
Application No.: US12497902Application Date: 2009-07-06
-
Publication No.: US08795805B2Publication Date: 2014-08-05
- Inventor: Toshio Ohoshi , Reynard Tanuprayogi , Jun Nakano
- Applicant: Toshio Ohoshi , Reynard Tanuprayogi , Jun Nakano
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sony Corporation
- Priority: JP2008-199647 20080801
- Main IPC: G11B7/24
- IPC: G11B7/24

Abstract:
An optical disc recording medium includes a disc substrate, at least one recording layer which is disposed on one surface side of the disc substrate, a cover layer which is disposed on a laser incident surface side of the recording layer and which is composed of a light-transmissive resin layer, and a hard coat layer which is disposed for surface protection on a laser incident surface side of the cover layer and which is composed of a light-transmissive resin layer. The cover layer is formed such that its thickness decreases from the central portion to the peripheral portion of the disc, the hard coat layer is formed such that its thickness increases from the central portion to the peripheral portion, and the total thickness of the cover layer and the hard coat layer is substantially uniform from the central portion to the peripheral portion.
Public/Granted literature
- US20100028590A1 OPTICAL DISC RECORDING MEDIUM AND METHOD OF MANUFACTURING OPTICAL DISC Public/Granted day:2010-02-04
Information query
IPC分类: