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:
Dec. 23, 2003
Filed:
Aug. 17, 2000
Hiroki Yamamoto, Hitachi, JP;
Takashi Naito, Hitachiota, JP;
Takashi Namekawa, Hitachi, JP;
Yasuo Imanishi, Hitachi, JP;
Motoyasu Terao, Hinode-machi, JP;
Toshimichi Shintani, Kodaira, JP;
Ken Takahashi, Tokai-mura, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An optical information recording medium includes an inorganic film which changes an intensity or an intensity distribution of light formed on an upper surface of a board, and a recording film, a protecting film, and a reflecting film formed on an upper portion of the inorganic film. The inorganic film is constructed by N (N is an integer of 2 or more) kinds of phases, the phases of the kinds within a range from at least one or more kinds to (N−1) kinds among the N kinds of phases are continuous phases, and the other phases are discontinuous phases. Information, consequently, may be written in high density.