Method of making a chip coil
First Claim
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1. A method of shielding a chip coil, said chip coil comprising a bobbin, flanges formed at opposite ends of said bobbin, and a wire wound around said bobbin between said flanges, the method comprising the steps of:
- (a) forming at least two counterpart blocks comprising magnetic particle-containing solid resin;
(b) disposing said blocks about said bobbin, said blocks engaging each other so as to substantially surround said wire; and
(c) fixing said blocks to each other to form a combined unit;
wherein each of said counterpart blocks of magnetic particle-containing solid resin is formed by mixing magnetic particles selected from the group consisting of Mn-Zn and Ni-Zn magnetic particles into a resin selected from the group consisting of epoxy resin and silicone resin, in a mixing ratio of substantially 100 to 1900 parts of the magnetic particles to 100 parts of the resin, to form a composite material; and
wherein said composite material is prepared in a semi-hardened state and then preliminarily molded into a block having a shape which permits said block to engage the flanges and the wire wound on the bobbin.
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Abstract
A chip coil which includes a bobbin, flange portions formed at opposite end portions of the bobbin, a wire wound around a barrel portion of the bobbin, and at least two counter-part blocks of magnetic particle-containing solid resin, disposed around the wound wire. The counter-part blocks of magnetic particle-containing solid resin are adapted to be fixed to each other into one combined unit.
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Citations
10 Claims
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1. A method of shielding a chip coil, said chip coil comprising a bobbin, flanges formed at opposite ends of said bobbin, and a wire wound around said bobbin between said flanges, the method comprising the steps of:
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(a) forming at least two counterpart blocks comprising magnetic particle-containing solid resin; (b) disposing said blocks about said bobbin, said blocks engaging each other so as to substantially surround said wire; and (c) fixing said blocks to each other to form a combined unit; wherein each of said counterpart blocks of magnetic particle-containing solid resin is formed by mixing magnetic particles selected from the group consisting of Mn-Zn and Ni-Zn magnetic particles into a resin selected from the group consisting of epoxy resin and silicone resin, in a mixing ratio of substantially 100 to 1900 parts of the magnetic particles to 100 parts of the resin, to form a composite material; and wherein said composite material is prepared in a semi-hardened state and then preliminarily molded into a block having a shape which permits said block to engage the flanges and the wire wound on the bobbin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification