| 摘要 |
A multilayered coil is formed by inserting insulating paper 13 having either a pressure sensitive adhesive or an adhesive disposed on both faces thereof into at least one place between thin coil layers and, then, magnetic cores 15 are mounted to the multilayered coil from above and below. Thus, a thin transformer for a switching power supply is provided, in which variations in distance between coil 11 and coil 12, of which one is disposed over the other, variations in distance of coil 11, and coil 12, from magnetic core 15, and the like, are suppressed.
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