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. 22, 2009
Filed:
Dec. 07, 2006
Yumiko Ozaki, Tokyo, JP;
Osamu Shinoura, Tokyo, JP;
Yumiko Ozaki, Tokyo, JP;
Osamu Shinoura, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A capacitor comprises: a lower electrode formed of a foil made of a polycrystalline metal; an upper conductor layer; and a dielectric layer disposed between the lower electrode and the upper electrode layer. Grain boundaries of the polycrystalline metal appear at the top surface of the lower electrode. The capacitor further comprises an insulator that is disposed between the top surface of the dielectric layer and the bottom surface of the upper electrode layer and that is present only in part of a region in which the top surface of the dielectric layer and the bottom surface of the upper electrode layer face each other. The insulator is disposed to cover at least part of the grain boundaries appearing at the top surface of the lower electrode when seen from above the top surface of the dielectric layer. The insulator is formed by electrophoresis.