Coil element
Patent 6181232 Issued on January 30, 2001. Estimated Expiration Date: 
July 23, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 23, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesChoke coil for eliminating common mode noise and normal mode noise Method of manufacturing a chip transformer Patent #: 5761791 InventorAssigneeApplicationNo. 121245 filed on 07/23/1998US Classes:336/200, Printed circuit-type coil336/83, CORE FORMS CASING336/212, PLURAL PART CORE336/223Having conductor of particular shape (e.g., tapered longitudinally or of noncircular cross section)ExaminersPrimary: Gellner, Michael L.Assistant: Mai, Anh Attorney, Agent or FirmForeign Patent References
International ClassH01F 005/00Foreign Application Priority Data1997-08-04 JPAbstractA coil element includes a composite member located on a first magnetic substrate, a second magnetic substrate disposed on the composite member and an adhesive layer located therebetween. The composite member includes coil patterns and insulating layers. The adhesive layer is composed of a material having a relative magnetic permeability of more than about 1.0. Alternatively, the insulating layers, excluding a portion which surrounds an overlapping region of coil patterns, are composed of a material having a relative magnetic permeability of more than about 1.0. Alternatively, the insulating layers are provided with holes in the approximate central regions of the insulating layers surrounded by the coil patterns, and the holes are filled with the material of the adhesive layer. | |
