Common mode choke coil and method of manufacturing the same
AssigneeFujitsu Limited
InventorsManabu Takayama, Kouji Taketomi, Tetsuo Kumahora
Life of this patent
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Abstract
A common mode choke coil has a plurality of metallic conducting wires buried into a sintered magnetic material such that the metallic conducting wires are proximate to each other and an electrode mounted on a surface of the sintered magnetic material so as to be connected to each end portion of each of the metallic conducting wires. The metallic conducting wires are integrally coated with a non-magnetic and electrically insulating material at a predetermined distance between each of the metallic conducting wires to thereby form coated conducting wires. The coated conducting wires buried into the sintered magnetic material are thus obtained.
Claims7
A method of manufacturing a common mode choke coil comprising the steps of:
- a) kneading powder of a magnetic material and a binder together;
- b) burying coated conducting wires into a semimanufactured product obtained in step a), said coated conducting wires each having a length equivalent to at least several common mode choke coils and being integrally coated with a nonmagnetic and electrically insulating material in a state in which a plurality of metallic conducting wires are spaced apart with a predetermined distance therebetween;
- wherein step b) further comprises the steps of:
- b1) forming a core of the semimanufactured product obtained in step a)
- b2) winding said coated conducting wires around said core;
- and thereafter,
- b3) coating the semimanufactured product obtained in step b2) with the semimanufactured product obtained in step a);
- c) dividing the semimanufactured product obtained in step b) into pieces, each piece having a length equivalent to one common mode choke coil;
- d) exposing both end portions of each of said metallic conducting wires which constitute said coated conducting wires;
- e) sintering the semimanufactured product obtained in step d);
- and thereafter,
- f) connecting an electrode to each of said end portions of each of said metallic conducting wires;
- wherein said coated conducting wires are twisted together.
A method of manufacturing a common mode choke coil comprising the steps of:
- a) kneading powder of a magnetic material and a binder together;
- b) burying coated conducting wires into a semimanufactured product obtained in step a), said coated conducting wires each having a length equivalent to at least several common mode choke coils and being integrally coated with a nonmagnetic and electrically insulating material in a state in which a plurality of metallic conducting wires are spaced apart with a predetermined distance therebetween;
- c) dividing the semimanufactured product obtained in step b) into pieces, each piece having a length equivalent to one common mode choke coil;
- d) exposing both end portions of each of said metallic conducting wires which constitute said coated conducting wire;
- e) connecting an electrode to each of said end portions of each of said metallic conducting wires;
- and thereafter
- f) sintering the semimanufactured product obtained in step e).
A method of manufacturing a common mode choke coil comprising the steps of:
- a) kneading powder of a magnetic material and a binder together;
- b) burying a coated conducting wire into a semimanufactured product obtained in step a), said coated conducting wires each having a length equivalent to at least several common mode choke coils and being integrally coated with a nonmagnetic and electrically insulating material in a state in which a plurality of metallic conducting wires are spaced apart with a predetermined distance therebetween;
- c) sintering the semimanufactured product obtained in step b);
- d) dividing the semimanufactured product obtained in step c) into pieces, each piece having a length equivalent to one common mode choke coil;
- e) exposing both end portions of each of said metallic conducting wires which constitute said coated conducting wires;
- and thereafter
- f) connecting an electrode to each of said end portions of each of said metallic conducting wires.
Dependencies are inferred from the claim text.