Inductor and electric power supply using it
First Claim
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1. An electronic device comprising:
- a circuit board; and
a power supply circuit provided in the circuit board and configured to supply power to a semiconductor device mounted on a surface of the circuit board,wherein the power supply circuit includes an inductor extending in a thickness direction of the circuit board perpendicular to the surface of the circuit board, the inductor comprises a magnetic body extending in the thickness direction of the circuit board and a through-hole conductor extending in the thickness direction of the circuit board, the magnetic body of the inductor has a through-hole extending in the thickness direction of the circuit board, and the through-hole conductor of the inductor is formed on an inner surface of the through-hole formed in the magnetic body.
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Abstract
An inductor embedded in a printed wiring board includes a conductor extending in the thickness direction of a printed circuit board and a magnetic body that is in contact with the conductor with no gap therebetween. For example, the magnetic body is composed of ferrite having a cylindrical tubular shape. The conductor is composed of a copper film formed by plating on an inner peripheral surface of the cylindrical tubular ferrite. The inductor is inserted in the thickness direction of the printed wiring board.
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Citations
13 Claims
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1. An electronic device comprising:
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a circuit board; and a power supply circuit provided in the circuit board and configured to supply power to a semiconductor device mounted on a surface of the circuit board, wherein the power supply circuit includes an inductor extending in a thickness direction of the circuit board perpendicular to the surface of the circuit board, the inductor comprises a magnetic body extending in the thickness direction of the circuit board and a through-hole conductor extending in the thickness direction of the circuit board, the magnetic body of the inductor has a through-hole extending in the thickness direction of the circuit board, and the through-hole conductor of the inductor is formed on an inner surface of the through-hole formed in the magnetic body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification