| 摘要 |
PURPOSE:To improve Q of a coil and reduce leakage magnetic flux by forming fan- shape conductive parts to a conductive layer which forms a troidal type printed coil. CONSTITUTION:External circumferences of the fan-shape conductive part 1 of first conductive layer and the fan-shape conductive part 2 of second conductive layer are provided opposed one by one to each other,and the internal circumference of fan-shape conductive part 1 of the first conductive layer is provided opposed to each other with the internal circumference of fan-shape conductive part 2 of second conductive layer adjacent to the fan-shape conductive part of second conductive layer opposed at the external circumference. The fan-shape conductive part 1 of the first conductive layer is connected with the fan-shape conductive part 2 of second conductive layer through the through holes 5 at the external and internal circumferences, except for only one region of the external circumference or internal circumference to which the fan-shape conductive part is opposed, the electrode terminals 4a, 4b are extracted from the region not connected through the through holes of the fan-shape conductive parts 1, 2 of the first and second conductive layers, thereby a troidal type printed coil can be formed with the fan-shape conductive parts 1, 2 and through holes 5.
|
