| 摘要 |
<p>A printed coil having a good magnetic coupling, low loss and good high frequency characteristics as a transformer is provided. The printed coil comprises a plurality of conductor forming planes N11,N12,N21,N22 on which a conductor pattern 55a,55b,55c,55d having one or more turns are formed centering on a core inserting hole, laminated with an insulating layer. Each of the conductor forming planes is provided with outer peripheral connecting holes provided on the outer peripheral side of the conductor pattern 55a,55b,55c,55d and a plurality of inner peripheral connecting holes provided on the inner peripheral side thereof. The outer and inner peripheral connecting holes are connected with the conductor pattern 55a,55b,55c,55d on the own conductor forming plane N11,N12,N21,N22 corresponding to a function of each conductor forming plane. Means 43f,43g for electrically connecting the outer and inner peripheral connecting holes are provided.</p> |
