Patent 7449985 was granted and assigned to Sumida on November, 2008 by the United States Patent and Trademark Office.
A problem to be solved is to stabilize temperature characteristics in various characteristics of a magnetic element. A magnetic element has a coil formed by winding a conductor, EP cores constituted of a magnetic material and passing magnetic flux generated in the coil, a solid part provided between EP cores opposing each other among the EP cores, and having a ceramics material or a resin material, in which the solid part is in contact with opposing faces of the respective opposing EP cores, and the solid part is provided with a thickness dimension ranging from 3 μm to 30 μm.