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:
Jun. 01, 1993
Filed:
Mar. 19, 1992
Applicant:
Inventors:
William Larson, Colorado Springs, CO (US);
Paul J Schuele, Colorado Springs, CO (US);
Assignee:
Ramtron International Corporation, Colorado Springs, CO (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01G / ; H01G / ; H01G / ; G11C / ;
U.S. Cl.
CPC ...
361313 ; 29 2542 ; 365145 ; 257295 ;
Abstract
A ferroelectric capacitor for use in integrated circuits and having an asymmetric operation. The capacitor has a bottom electrode, a layer of ferroelectric material over the bottom electrode, a dielectric spacer on the sides of the bottom electrode and ferroelectric material, and a top electrode over the layer of ferroelectric material. The bottom and top electrode are comprised of different materials. Alternatively, an ion implantation region is formed in the top surface of the layer of ferroeletric material. A method of forming the asymmetric ferroelectric capacitor is also disclosed.