| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a coil component which can efficiently radiate the heat generated from a magnetic core to the outside by highly efficiently transmitting the heat to a winding side and can be reduced in size. SOLUTION: This coil component 1 is constituted in such a way that the magnetic core 2 of this component is constituted by connecting two E-shaped magnetic core pieces 20 to each other in a butted state, and the first and second coils 3 and 4 of this component are formed by winding wires 30 and 40 around the core 2. In addition, a gelatinous sheet material 5 is put between the core 2 and first coil 3 and between the first and second coils 3 and 4 in wound states. The sheet material 5 is formed by mixing a heat conductive filler, such as alumina, boron nitride, etc., and soft magnetic powder in an insulating silicon- based resin having such flexibility that the resin is elastically deformed in a gelatinous state. Since the material 5 is elastically deformed in the gelatinous state, the material 5 closely adheres to the magnetic core 2 and first and second coils 3 and 4 without forming any gap and can highly efficiently transmit the heat generated from the core 2 to the wires 30 and 40.</p> |
