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:
Oct. 11, 2005
Filed:
Sep. 03, 2003
Makoto Miyamoto, Ome, JP;
Junko Ushiyama, Kokubunji, JP;
Keikichi Ando, Musashino, JP;
Yumiko Anzai, Ome, JP;
Akemi Hirotsune, Urawa, JP;
Motoyasu Terao, Hinode, JP;
Tetsuya Nishida, Tokyo, JP;
Yasushi Miyauchi, Akishima, JP;
Mitsuhide Miyamoto, Kokubunji, JP;
Makoto Miyamoto, Ome, JP;
Junko Ushiyama, Kokubunji, JP;
Keikichi Ando, Musashino, JP;
Yumiko Anzai, Ome, JP;
Akemi Hirotsune, Urawa, JP;
Motoyasu Terao, Hinode, JP;
Tetsuya Nishida, Tokyo, JP;
Yasushi Miyauchi, Akishima, JP;
Mitsuhide Miyamoto, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Maxell, Ltd., Osaka, JP;
Abstract
This invention relates to an information-recording medium that is used for recording information through radiation of energy beam. The information recording medium has a groove-shaped information recording track and is provided with a recording layer, one or more kinds of heat sink control layers and heat sink layers. A sum of film thickness of the more than one kind of recording layer is equal to or less than a step between information recording tracks, and a sum of film thickness of one or more kinds of heat sink control layers is more than a groove depth of the information recording track. With this configuration, no cross-erase is produced even if the information-recording medium is applied for a high density recording with the track pitch being 70% or less.