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, 2001
Filed:
Jul. 14, 1998
Applicant:
Inventors:
Akira Okutoh, Kobe, JP;
Yasuyuki Itoh, Yokohama, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 2/994 ; H01L 2/7108 ; H01L 2/976 ; H01L 3/1119 ;
U.S. Cl.
CPC ...
H01L 2/994 ; H01L 2/7108 ; H01L 2/976 ; H01L 3/1119 ;
Abstract
An alloy oxide film of platinum and rhodium is formed as an upper electrode so as to be put in direct contact with a ferroelectric PZT film. Asymmetry of a hysteresis loop characteristic of a dielectric material representing a correlation between a polarization value and an application electric field as well as a deterioration such as an increase in leak current density, when oxide electrode of IrO,, RuO,, RhO,or the like is used, are improved.