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:
Jan. 23, 2007
Filed:
Jun. 22, 2004
Hiroshi Tanaka, Sagamihara, JP;
Takahiro Yamamoto, Otsu, JP;
Hajime Arakawa, Kyoto, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A laminated coil is constructed such that an inner space of each via hole can be increased while the spacing between adjacent via holes in the axial direction of a coil is prevented from being narrowed. In the via holes of the laminated coil, through-holes formed in ceramic layers and filled with a conductor are arranged in a row in the lamination direction X, and, in each of the through-holes, the difference between the diameter in the axial direction of the coil on the opening surface of one opening of a ceramic layer and the diameter in the axial direction of the coil on the opening surface of the other opening is smaller than the difference between the diameter in the direction Z that is substantially perpendicular to the axial direction Y of the coil on the opening surface of one opening of the ceramic layer and the diameter in the direction Z that is substantially perpendicular to the axial direction Y of the coil on the opening surface of the other opening.