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:
Apr. 19, 2005
Filed:
Mar. 19, 2003
Rie Kojima, Kadoma, JP;
Haruhiko Habuta, Osaka, JP;
Takashi Nishihara, Hirakata, JP;
Hideki Kitaura, Seika-cho, JP;
Noboru Yamada, Hirakata, JP;
Rie Kojima, Kadoma, JP;
Haruhiko Habuta, Osaka, JP;
Takashi Nishihara, Hirakata, JP;
Hideki Kitaura, Seika-cho, JP;
Noboru Yamada, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Osaka-fu, JP;
Abstract
An information recording medium ensures high reliability and favorable overwrite cycle-ability even when an interface layer is not provided between a recording layer and a dielectric layer. The recording layer and the dielectric layers are formed on the surface of the substrate. In the recording layer, a phase change is generated between a crystal phase and an amorphous phase by irradiation of light or application of electric energy. The dielectric layers are oxide-fluoride-based material layers containing one or more oxides which each are an oxide of at least one element selected from a first group including only Ti, Zr, Cr, Hf, Nb, Ta, Cr and Si and one or more fluorides which each are a fluoride of at least one element selected from a second group including only La, Ce, Pr, Nd, Gd, Dy, Ho, Er and Yb.