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. 18, 2011
Filed:
Dec. 17, 2008
Takao Watanabe, Fuchu, JP;
Toshimichi Shintani, Kodaira, JP;
Takeshi Maeda, Koganei, JP;
Akemi Hirotsune, Odawara, JP;
Yoshitaka Bito, Kokubunji, JP;
Takao Watanabe, Fuchu, JP;
Toshimichi Shintani, Kodaira, JP;
Takeshi Maeda, Koganei, JP;
Akemi Hirotsune, Odawara, JP;
Yoshitaka Bito, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An information memory device using an electromagnetic-wave resonance phenomenon is provided to achieve both high density and long-period storage of stored data. Memory cells are three-dimensionally arranged in the inside of a solid-like medium which is not contacted with a surface of the medium, and the memory cell has resonance characteristics to electromagnetic waves depending on the space coordinates of the memory cell. For the medium, a material is selected so that an electromagnetic wave having the resonance frequency of the memory cell. By observing absorption spectra of the irradiated electromagnetic wave or emission spectra after the absorption, three-dimensional space coordinates of the memory cell are calculated.