| 摘要 |
PROBLEM TO BE SOLVED: To provide a thin transformer capable of finely adjusting an inductance value with a simple constitution.SOLUTION: A thin transformer according to one embodiment comprises: a bobbin 10 having a cylinder part 11 around which a primary side coil is wound; a multilayer substrate 20 formed by laminating plural substrates 21 on a main face of which a spiral conductor pattern 22 constituting a secondary side coil is formed upward and downward; and a core 70 having core body parts 71, 72a forming a magnetic path between the primary side coil and the secondary side coil, and an extension core part 72b extending along the main face of the multilayer substrate 20 from the core body part and arranged above a coil formation region C in which the secondary side coil is formed. |
