Inductor and method of manufacturing the same
First Claim
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1. A method of manufacturing an inductor, comprising the steps of:
- providing a spacer pin which defines a core, and which includes a magnetic sinter, in a mold;
placing a coil on the spacer pin so as to surround the spacer pin;
injecting into the mold a composite material which has a permeability that is different from that of the magnetic sinter and which includes a mixture of a powdered magnetic material and a resin, to thereby obtain a molded body having embedded therein the coil and the spacer pin; and
forming external electrodes on outside surfaces of the molded body such that both ends of the coil are connected to the external electrodes.
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Abstract
An inductor and a manufacturing method for the inductor includes disposing a spacer pin defining a core, and which includes a magnetic sinter, in a mold, and placing a coil so as to surround the spacer pin. A composite material which has a permeability that is different from that of the magnetic sinter and which includes a mixture of a powdered magnetic material and a resin, is then injected into the mold to obtain a molded body having embedded therein the coil and the spacer pin. Next, external electrodes are formed on outside surfaces of the molded body such that both ends of the coil are connected to the external electrodes.
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Citations
19 Claims
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1. A method of manufacturing an inductor, comprising the steps of:
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providing a spacer pin which defines a core, and which includes a magnetic sinter, in a mold;
placing a coil on the spacer pin so as to surround the spacer pin;
injecting into the mold a composite material which has a permeability that is different from that of the magnetic sinter and which includes a mixture of a powdered magnetic material and a resin, to thereby obtain a molded body having embedded therein the coil and the spacer pin; and
forming external electrodes on outside surfaces of the molded body such that both ends of the coil are connected to the external electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of manufacturing an inductor, comprising the steps of:
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preparing a mold comprising a lower mold portion and an upper mold portion, defining a cavity therebetween, the lower mold having a spacer-pin insertion hole provided therein for inserting a spacer pin made of a magnetic sinter through the lower mold portion;
inserting the spacer pin via the spacer-pin insertion hole through the lower mold portion;
disposing a coil in the lower mold portion, the spacer-pin insertion hole being located at an approximate center of the lower mold portion;
inserting the spacer pin into the molding cavity defined by the upper mold portion and the lower mold portion, and injecting a composite material, which includes a magnetic material and a resin, into the molding cavity while the coil is disposed around the spacer pin, thereby obtaining a molded body having embedded therein the spacer pin and the coil; and
forming external electrodes on outside surfaces of the molded body after the molded body is removed from the mold. - View Dependent Claims (9, 10, 11, 12, 13, 15, 16, 17, 18, 19)
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14. An inductor comprising:
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a molded body included a molded composite material including a mixture of a powdered magnetic material and a resin;
a core embedded in the molded body, the core including a magnetic sinter that has a permeability that is different from that of the composite material constituting the molded body;
a coil arranged so as to surround the core and embedded in the molded body such that both ends of the coil are exposed at the outside surfaces of the molded body; and
a plurality of external electrodes disposed on the outside surfaces of the molded body such that both ends of the coil are electrically connected to the electrodes.
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Specification