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:
Sep. 02, 2003
Filed:
Sep. 19, 2002
Applicant:
Inventors:
Bum-ki Moon, Tokyo, JP;
Moto Yabuki, Tokyo, JP;
Gerhard Beitel, Kanagawa, JP;
Nicolas Nagel, Kanagawa, JP;
Andreas Hilliger, Kanagawa, JP;
Takamichi Tsuchiya, Tokyo, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01G 4/228 ;
U.S. Cl.
CPC ...
H01G 4/228 ;
Abstract
A capacitor over plug (COP) structure is disclosed. The COP avoids the step which is created in conventional COP structures, which adversely impacts the properties of the capacitor. In one embodiment, the step is avoided by providing a plug having upper and lower portions. The upper portion, which is coupled to the bottom electrode of the capacitor, has substantially the same surface area as the bottom electrode. A barrier layer can be provided between the plug and bottom electrode to avoid oxidation of the plug material.