INDUCTOR AND ELECTRIC POWER SUPPLY USING IT
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Abstract
A printed wiring board including a substrate having a first surface and a second surface on the opposite side of the second surface, a first conductive circuit formed on the first surface of the substrate, a second conductive circuit formed on the second surface of the substrate, a magnetic body embedded in the substrate and extending in a thickness direction of the substrate, the magnetic body having a through-hole formed through the magnetic body and extending in the thickness direction of the substrate, and a through-hole conductor formed on an inner surface of the through-hole of the magnetic body such that the first and second conductive circuits are electrically connected to each other through the through-hole conductor.
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Citations
28 Claims
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1-10. -10. (canceled)
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11. A printed wiring board, comprising:
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a substrate having a first surface and a second surface on an opposite side of the second surface; a first conductive circuit formed on the first surface of the substrate; a second conductive circuit formed on the second surface of the substrate; a magnetic body embedded in the substrate and extending in a thickness direction of the substrate, the magnetic body having a through-hole formed through the magnetic body and extending in the thickness direction of the substrate; and a through-hole conductor formed on an inner surface of the through-hole of the magnetic body such that the first and second conductive circuits are electrically connected to each other through the through-hole conductor. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of manufacturing a printed wiring board, comprising:
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preparing an inductor comprising a magnetic body and a through-hole conductor, the magnetic body having a cylindrical shape and a through-hole, the through-hole conductor being formed on an inner surface of the through-hole of the magnetic body; forming a through-hole through a core substrate; embedding the inductor into the through-hole of the core substrate; forming first copper plating layers on first and second surfaces of the core substrate, respectively; patterning the first copper plating layers such that first conductive circuits are formed, respectively; forming insulating layers on the first conductive circuits and the first and second surfaces of the core substrate, respectively; forming via holes in the insulating layers, respectively; forming second copper plating layers on the insulating layers and the via holes, respectively; and patterning the second copper plating layers such that second conductive circuits are formed, respectively. - View Dependent Claims (22, 23, 24, 25)
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26. A method of manufacturing a printed wiring board, comprising:
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preparing an inductor comprising a magnetic body which has a cylindrical shape and a through-hole; forming a through-hole through a core substrate; embedding the inductor into the through-hole of the core substrate; copper-plating an inner surface of the through-hole of the magnetic body and first and second surfaces of the core substrate, respectively, such that a through-hole conductor is formed on the inner surface of the through-hole of the magnetic body and that first copper plating layers are formed on the first and second surfaces of the core substrate, respectively; patterning the through-hole conductor on the inner surface of the through-hole of the magnetic body and the first copper plating layers such that first conductive circuits are formed, respectively; forming insulating layers on the first conductive circuits and the first and second surfaces of the core substrate, respectively; forming via holes in the insulating layers, respectively; forming second copper plating layers on the first and second surfaces of the insulating layers and the via holes, respectively; and patterning the second copper plating layers such that second conductive circuits are formed, respectively. - View Dependent Claims (27, 28)
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Specification