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. 03, 2000
Filed:
Apr. 29, 1998
Applicant:
Inventors:
Takashi Nakamura, Kyoto, JP;
Yuichi Nakao, Kyoto, JP;
Assignee:
Rhohm Co., LTD, Kyoto, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365145 ; 36518501 ; 327295 ;
Abstract
On the surface of a semiconductor substrate between a source region and a drain region formed on the semiconductor substrate, an insulating layer, a conductive thin film used as a floating electrode, a ferroelectric thin film and a conductive thin film used as a control electrode are successively formed. Writing or erasing is performed by causing a potential difference between the control electrode and the semiconductor substrate to reverse the polarization of the ferroelectric thin film.