| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic device capable of increasing a wound number of a coil while preventing an increase of a size, and of suppressing heat evolution.SOLUTION: The magnetic device 1 includes: a core 2a; a substrate 3 penetrated by the core 2a; and coil patterns 4a-4f disposed on the substrate 3 to be wound around the core 2a. Coil patterns 4a, 4b, 4d, 4e with wide width and coil patterns 4c, 4f with narrow width are respectively disposed on a plurality of layers L2, L3 on the substrate 3. The coil patterns 4c, 4f having the narrow width on the different layers L2, L3 are formed to have a matching projection pattern when projected on a plate surface of the substrate 3, and are connected with each other in parallel. The coil patterns 4a, 4b, 4d, 4e with the wide width on the different layers L2, L3 are serially connected with one another. The coil pattern 4f with the narrow width and the coil patterns 4d, 4e with the wide width are serially connected with one another on the third layer L3. |
