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:
Mar. 23, 2004
Filed:
Oct. 17, 2002
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A coil device includes a first magnetic substrate, a laminated body disposed on the first magnetic substrate and having insulating layers, coil patterns, and at least one through-hole, a magnetic layer covering the upper surface of the laminated body, an adhesive layer disposed on the magnetic layer, and a second magnetic substrate disposed on the adhesive layer and bonded to the magnetic layer via the adhesive layer. The insulating layers defining an insulator and the coil patterns for forming a coil are alternately stacked so that the coil patterns are arranged in the insulator, the through-hole is located at an area where the coils are not located and extends from the upper surface of the laminated body to the first magnetic substrate. The magnetic layer has at least one portion extending through the through-hole to contact the first magnetic substrate. The adhesive layer is nonmagnetic, and the laminated body is sandwiched between the first and second substrates.