Inductors with minimized EMI effect and the method of manufacturing the same
DC
First Claim
1. An inductor with enhanced inductance comprising:
- (a) a magnetic core;
(b) an electrically conducting coil wound about said magnetic core;
(c) a magnetic resin layer compression-molded to embed at least a portion of an outer periphery of said electrically conducting coil;
(d) wherein said magnetic resin layer contains a magnetic powder dispersed in a polymer resin.
6 Assignments
Litigations
2 Petitions
Accused Products
Abstract
An inductor with enhanced inductance and reduced electromagnetic inductance (EMI) interference. It contains: (a) a magnetic core; (b) an electrically conducting coil wound about the magnetic core; and (c) a magnetic resin layer compression-molded to embed at least a portion of the outer periphery of the electrically conducting coil. The magnetic resin contains a magnetic powder dispersed in a polymer resin. For relatively low inductance inductors, instead of being of a hard metal rod, the magnetic core can be made of the same material as the magnetic resin. The inductance of the inductor can be controlled by controlling the magnetic permeability of the magnetic resin or the thickness of the magnetic resin layer, or both. The magnetic core can be a magnetic metal/metal oxide core, or a consolidated magnetic core made of the same or different magnetic resin as the magnetic resin layer. A metal magnetic sheath can be further provided outside of the magnetic resin layer.
33 Citations
20 Claims
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1. An inductor with enhanced inductance comprising:
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(a) a magnetic core; (b) an electrically conducting coil wound about said magnetic core; (c) a magnetic resin layer compression-molded to embed at least a portion of an outer periphery of said electrically conducting coil; (d) wherein said magnetic resin layer contains a magnetic powder dispersed in a polymer resin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for making inductors with enhanced inductance comprising the steps of:
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(a) winding an electrically conducting coil about a magnetic core; (b) forming a magnetic resin layer by compression molding to embed at least a portion of an outer periphery of said electrically conducting coil; (c) wherein said magnetic resin matrix contains a magnetic powder dispersed in a polymer resin. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification
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- Resources
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Current AssigneeMEC Resources, LLC (Three Affiliated Tribes of the Fort Berthold Reservation, North Dakota)
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Original AssigneeIndustrial Technology Research Institute
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InventorsTung, Mean-Jue, Huang, Yu-Ting
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Primary Examiner(s)Gellner, Michael L.
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Assistant Examiner(s)MAI, ANH T
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Application NumberUS09/304,471Time in Patent Office540 DaysField of Search336/96, 336/83, 336/84US Class Current336/83CPC Class CodesH01F 17/045 with core of cylindric geom...H01F 27/022 EncapsulationH01F 27/027 specially adapted for combi...
