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. 10, 2002
Filed:
Dec. 16, 1998
Hidekazu Kitamura, Shiga-ken, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A coil component uses a magnetic material having a relative permeability of a specified value or more which permits deviations in inductance to vary within a narrow range, even if the magnetic substrate material has a relative permeability having large deviations. The coil component includes a pair of magnetic substrates, non-magnetic layers and a coil. The non-magnetic layers and the coil are laminated between the magnetic substrates. A relative permeability of a material of the magnetic substrates is set such that a combined magnetic resistance R of the magnetic substrates which define a closed series magnetic circuit including the pair of magnetic substrates and the non-magnetic layers, and a combined magnetic resistance R of the non-magnetic layers have a relationship: R >R