The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 30, 2007
Filed:
Mar. 25, 2005
Minoru Takeda, Tokyo, JP;
Nobuyuki Arakawa, Kanagawa, JP;
Motohiro Furuki, Tokyo, JP;
Shingo Imanishi, Kanagawa, JP;
Minoru Takeda, Tokyo, JP;
Nobuyuki Arakawa, Kanagawa, JP;
Motohiro Furuki, Tokyo, JP;
Shingo Imanishi, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A method of producing a stamper, an optical recording medium produced by molding using the stamper, and a method of producing the same, wherein a base member having a mirror polished main surface and comprising silicon or glass is formed with a resist film; the resist film is exposed by a focused electron beam, an ultraviolet ray laser, etc. and developed so as to form a resist film of a pattern corresponding to relief shapes; the mirror surface of the base member is processed to relief shapes (projecting regions and recessed regions) by dry etching etc. using the obtained resist film as a mask so as to obtain a stamper; the obtained stamper is used for injection molding to form a medium substrate; and an optical recording multilayer film and a protective layer are formed to thereby produce an optical recording medium.