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:
May. 31, 2005
Filed:
Feb. 02, 2004
Applicant:
Shigeharu Matsushita, Katano, JP;
Inventor:
Shigeharu Matsushita, Katano, JP;
Assignee:
Sanyo Electric Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C011/22 ;
U.S. Cl.
CPC ...
Abstract
A ferroelectric memory capable of suppressing false data reading or the like by increasing a read margin is obtained. This ferroelectric memory comprises a circuit applying a read voltage Vto a first electrode and a detector capable of detecting the difference between electric capacitances Cand Cof a ferroelectric film when the potential difference of a second electrode corresponding to the difference between the electric capacitances Cand Cof the ferroelectric film is in excess of a detection limit voltage V. The electric capacitance Cof the second electrode is set to satisfy the following expression:×{()−()}.