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. 24, 2009
Filed:
Sep. 28, 2001
Katsuyuki Yamada, Kanagawa, JP;
Shinya Narumi, Kanagawa, JP;
Makoto Harigaya, Kanagawa, JP;
Katsuhiko Tani, Tokyo, JP;
Noriyuki Iwata, Kanagawa, JP;
Nobuaki Onagi, Kanagawa, JP;
Kazunori Ito, Kanagawa, JP;
Takashi Shibaguchi, Kanagawa, JP;
Eiko Hibino, Kanagawa, JP;
Hajime Yuzurihara, Kanagawa, JP;
Hiroko Ohkura, Kanagawa, JP;
Akira Shimofuku, Kanagawa, JP;
Yuki Nakamura, Kanagawa, JP;
Katsuyuki Yamada, Kanagawa, JP;
Shinya Narumi, Kanagawa, JP;
Makoto Harigaya, Kanagawa, JP;
Katsuhiko Tani, Tokyo, JP;
Noriyuki Iwata, Kanagawa, JP;
Nobuaki Onagi, Kanagawa, JP;
Kazunori Ito, Kanagawa, JP;
Takashi Shibaguchi, Kanagawa, JP;
Eiko Hibino, Kanagawa, JP;
Hajime Yuzurihara, Kanagawa, JP;
Hiroko Ohkura, Kanagawa, JP;
Akira Shimofuku, Kanagawa, JP;
Yuki Nakamura, Kanagawa, JP;
Ricoh Company, Ltd, Tokyo, JP;
Abstract
An optical information recording medium is provided. This medium at least stores information that indicates a maximum recording linear velocity Vh. The medium comprises a substrate having a concentric circular guide groove. This guide grove has land portions and groves portions. At least a phase change type recording layer is formed on the substrate. The recording layer has such a composition and thickness that a dislocation linear velocity V satisfies the relation V≧Vh×0.85.