| 摘要 |
PURPOSE:To obtain an inductor element which is higher in inductance than a dust core by a method wherein an oriented Fe-Si alloy foil coated with an electrical insulating film is rolled into a ring to serve as a toroidal core so as to make the direction of orientation coincident with a circumferential direction, and winding is wound on the core for the formation of an inductor. CONSTITUTION:An Fe-Si alloy foil is set in Si content ranging from 1wt% to 7wt.% and 10mum to 200mum in thickness. Crystal grains contained in the foil are oriented in such a state that a plane orientation is (100) and a direction of orientation is [001]. The alloy foil is coated with an electrical insulating film and then cut along the direction of rolling into belt-like foils prescribed in width. The belt-like foil is rolled into a ring making the direction of orientation coincident with a circumferential direction to serve as a toroidal core. By this setup, an inductor higher than a dust core in inductance can be obtained. |
