| 摘要 |
PROBLEM TO BE SOLVED: To enhance radiation performance of a substrate in which coil patterns having different widths are provided in a plurality of layers.SOLUTION: A magnetic device 1 includes: a core 2a formed from a magnetic material; a substrate 3 which is formed from an insulator and into which the core 2a penetrates; and coil patterns 4a, 4b, 4c which are provided in respective layers L1, L2 of the substrate 3 and formed from a conductor. The width W1 of the coil patterns 4a, 4b located in the outer surface layer L1 on the rear side of the substrate 3 is thinner than the width W2 of the coil pattern 4c located the outer surface layer L2 on the surface side. A heat sink 10 is provided on the outer surface layer L1 side of the rear side where the coil patterns 4a, 4b having thin width are located. |
