摘要 |
<p>PROBLEM TO BE SOLVED: To provide a thin transformer with high magnetic coupling, good conversion efficiency, and small defective effects from proximity effect between coil patterns in a high-frequency region. SOLUTION: Printed coils 2 and 3 are formed on both faces of an insulating board 1, and a core is assembled in the insulating board 1 with the printed coils 2 and 3. The input coil pattern 2 and the output coil pattern 3 are formed adjacent on the same face of the insulating board 1. At the same time, the input coil pattern 2 and the output coil pattern 3 are formed opposite on the front and rear faces of the insulating board 1. The insulating boards 1 with the input coil pattern 2 and the output coil pattern 3 on the front and rear faces are laminated to form a transformer.</p> |