Invention Grant
- Patent Title: Stamper production method and read-only optical disc production method
- Patent Title (中): 压模生产方法和只读光盘制造方法
-
Application No.: US12689602Application Date: 2010-01-19
-
Publication No.: US08278029B2Publication Date: 2012-10-02
- Inventor: Kensaku Takahashi
- Applicant: Kensaku Takahashi
- Applicant Address: JP Tokyo
- Assignee: Sony Corporation
- Current Assignee: Sony Corporation
- Current Assignee Address: JP Tokyo
- Agency: Wolf, Greenfield & Sacks, P.C.
- Priority: JP2009-009519 20090120
- Main IPC: G03F7/20
- IPC: G03F7/20 ; B44C1/22
Abstract:
A stamper production method includes: a stamper forming step of producing, by electroplating processing using a matrix in which a pit string constituted of a concave pit is formed on an inorganic resist layer based on recording information, a stamper on which a convex pit corresponding to the concave pit is formed; and an etching step of carrying out etching processing on the stamper so that a reduction ratio of a pit height of a short pit becomes larger than that of a long pit regarding the convex pit of the stamper.
Public/Granted literature
- US20100183986A1 STAMPER PRODUCTION METHOD AND READ-ONLY OPTICAL DISC PRODUCTION METHOD Public/Granted day:2010-07-22
Information query
IPC分类:
