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:
May. 04, 1999
Filed:
Nov. 21, 1995
Applicant:
Inventor:
Kazuo Dougauchi, Fukui-ken, JP;
Assignee:
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F / ; H01F / ;
U.S. Cl.
CPC ...
336200 ; 336232 ; 336223 ;
Abstract
A coil assembly includes a first magnetic mother board, and a second magnetic mother board. A coil is formed on the first magnetic mother board and composed of stacked coil conductors and insulating layers. A recess or groove is formed in the second magnetic mother board and has a shape corresponding to the shape of the coil. The coil is closely fit into the recess so as to insure connection of the first and second magnetic mother boards. Direct connection of the first and second magnetic mother boards provides a completely closed magnetic path. The insulating layers have no magnetic materials so as to provide a better electromagnetic connection.