| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a hybrid integrated circuit device mounting coil parts, having a higher conversion efficiency such as a coil part and a power supply circuit or the like, resulting in little eddy current loss. SOLUTION: In a coil part 30 of the type where a magnetic core is provided in lateral, terminal electrodes 26a to 26d are connected directly to collars of the ferrite magnetic core 25 consisting of a winding core part 22 (broken line) and collars 23, 24 at both ends of the winding core 22. Particularly, an area larger than 3/4 of each area of the upper surface 15, lower surface 16 and side surface 17 of the collars 23, 24 in an area M on the extending line of the winding core width W2 of the winding core part 22 of the ferrite magnetic core 25 is the area R not covered with the electrodes in order to suppress an eddy current loss. As a result, conversion efficiency can be improved in the hybrid integrated circuit device mounting coil parts, such as power supply circuit or the like mounting such a structure.</p> |
