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:
Feb. 24, 2004
Filed:
Oct. 01, 2002
Yoshiaki Hagiwara, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
A disk comprised by a substrate a signal layer made of aluminum in which pits are formed, and a protective plate The information reproducing apparatus emits an electron beam E from an electron gun to the signal layer of the disk detects a change of the incident intensity of the reflection thereof via a detector and reproduces the information of the disk by a reproducing circuit . A recording medium comprised by a conductive layer an insulating layer and island-like fixed electrodes thereon electrically insulated from the periphery with a memory function imparted to the fixed electrodes. For the writing, electrons are injected into the fixed electrodes by the electron gun. For full erasure, a voltage is applied to the conductive layer For the reading, the electrostatic effect of the counter electrodes and the fixed electrodes is utilized. This enables an increase of the volume of information and an enhancement of precision of the reading of the information.