| 摘要 |
<p>A plurality of annular holes (2) and a plurality of center holes (3) surrounded by the annular holes (2) are provided in an insulating substrate (1), by which a plurality of annular juts (4) each comprising a portion surrounded by the annular hole (2) and the center hole (3) are formed. A printed coil sheet having a plurality of toroidal printed coils, in which a conductor film (6) is spirally formed at front-and-rear surfaces and side surfaces of annular portions (5) of the annular juts (4) with each annular portion taken as an axis, is obtained. With this printed coil sheet, a plurality of toroidal printed coils (P) are obtained by cutting the insulating substrate (1) off from the individual annular juts (4). <IMAGE></p> |
