| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic device which can improve radiation performance of a multilayer substrate in which coil patterns are provided in a plurality of layers, respectively.SOLUTION: A magnetic device 1 comprises: a core 2a; openings 3m, 3L, 3r into which the core 2a is inserted; a multilayer substrate 3 having a surface layer L1, a rear face layer L3 and an inner layer L2 arranged between the layers L1, L3; coil patterns 4a-4c which are provided on the respective layers L1-L3 of the substrate 3 and wound around the core 2a; through holes 9a, 9b provided on the substrate 3, for connecting the coil patterns 4a-4c arranged on different layers L1-L3 with each other; and a plurality of terminals 6i, 6o provided through the substrate 3 so as to penetrate, for inputting/outputting power with respect to the coil patterns 4a-4c. The magnetic device 1 comprises radiation patterns 4 t, 4 t, 5 s, 4 t, 5 snear the terminals 6i, 6o of the surface layer L1 and the rear face layer L3, which spread in a board surface direction of the substrate 3. |
