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:
Mar. 16, 2010
Filed:
Jun. 06, 2003
Tomoki Ushida, Chuo-ku, JP;
Mamoru Usami, Chuo-ku, JP;
Kenji Yamaga, Chuo-ku, JP;
TDK Corporation, Tokyo, JP;
Abstract
An optical recording medium including a light transmitting layer having a uniform thickness formed on a substrate, in which a burr or stripping hardly occurs at the inner periphery of the light transmitting layer, and a manufacturing method and a manufacturing device of the optical recording medium are provided. An optical recording mediumis manufactured by a manufacturing method including: molding a disc-like shaped substrateincluding an information recording faceA on one side; forming a light transmitting layerthinner than the substrateon the information recording faceA; forming a circular cutin the light transmitting layer; and punching out an area inside the cutby a punching toolto form a center holeA in the light transmitting layerand a center holein the substrate