| 摘要 |
PROBLEM TO BE SOLVED: To provide multilayered coil devices, such as multilayered power inductors, multilayered common-mode choke coils, and high-frequency multilayered inductors, achieving lower direct-current resistance, wherein the multilayered coil devices are formed by alternately laminating insulating layers and spiral coil patterns. SOLUTION: In a multilayered coil device formed by alternately laminating insulating layers and spiral coil patterns, the number of turns of each spiral coil pattern exceeds at least one turn. A protrusion protruding toward the center side of each spiral coil pattern is provided in a coil pattern portion closest to the center side in a region where the number of coil pattern portions crossing a virtual line extending outward from the center of the spiral coil pattern is smaller than that of other coil pattern portions. COPYRIGHT: (C)2011,JPO&INPIT
|
