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. 13, 2012
Filed:
Oct. 30, 2008
Takao Watanabe, Fuchu, JP;
Toshimichi Shintani, Kodaira, JP;
Takeshi Maeda, Koganei, JP;
Akemi Hirotsune, Odawara, JP;
Tomonori Sekiguchi, Tama, JP;
Takao Watanabe, Fuchu, JP;
Toshimichi Shintani, Kodaira, JP;
Takeshi Maeda, Koganei, JP;
Akemi Hirotsune, Odawara, JP;
Tomonori Sekiguchi, Tama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In an information memory apparatus having minute areas for storing information arranged in x, y and z directions three-dimensionally, parallel rays are irradiated to a memory area MA in a direction perpendicular to a z-axis to take projection images of the memory area MA while rotating the memory area MA around the z-axis little by little. The light rays irradiated at this time have a size which covers at least a direction of an x-y plane of the memory area. A computation unit PU finds data and addresses of minute areas distributed three-dimensionally by performing computation based upon the principle of computer tomography on the projection images. As for data writing, a change is given to optical transmissivity or light emission characteristics by irradiating laser light focused by a lens OL placed outside the memory area to a desired minute area and causing heat denaturation within the pertinent minute area.