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:
Aug. 09, 2011
Filed:
May. 30, 2007
Kenji Okabe, Gunma, JP;
Kazuhiko Nakamura, Gunma, JP;
Toshifumi Kawata, Gunma, JP;
Yoshikazu Maruyama, Gunma, JP;
Kenji Okabe, Gunma, JP;
Kazuhiko Nakamura, Gunma, JP;
Toshifumi Kawata, Gunma, JP;
Yoshikazu Maruyama, Gunma, JP;
Taiyo Yuden Co., Ltd., Tokyo, JP;
Abstract
A multilayer inductor having a uniformly improved direct current superposition property and an increased inductance value is disclosed. The multilayer inductor contains a laminate of a plurality of first insulating layers and a plurality of conductive layers, and the conductive layers and through hole conductors are connected to form a helical coil in the laminate. A second insulating layer which has a magnetic permeability lower than those of the first insulating layers is disposed such that it crosses an inner magnetic path of the helical coil, and a margin of the second insulating layer overlaps with the conductive layer in the stacking direction and is in contact with the conductive layer in the overlap portion. The magnetic flux density in the laminate is likely to be highest in the overlap portion, and thus, the highest-density magnetic flux passes through the second insulating layer inevitably, whereby the direct current superposition property can be uniformly improved.