Manufacturing method of magnetic element

A manufacturing method of a magnetic element, comprising the steps of:

• sandwiching and holding at least one of a terminal unit and a coil terminal-end of a coil between a tubular-shaped upper-side die and a tubular-shaped lower-side die, while the coil is positioned in a tubular-shaped portion constituted by the upper-side die and the lower-side die;
• filling a magnetic material in the tubular-shaped portion after the step of sandwiching and holding;
• and
• pressure-molding a core, whose outside surface follows the inner walls of the upper-side die and the lower-side die, by pressurizing the magnetic material, which was filled in the step of filling, using an upper-side punch from the upper side and also by using a lower-side punch from the lower side, wherein
• at least one portion of the inner wall of the upper-side die and at least one portion of the inner wall of the lower-side die are spaced by respective different distances from the center of the tubular-shaped portion and, due to the difference in said respective distances, a step is formed in the tubular-shaped portion at a position where said at least one of the terminal unit and the coil terminal-end is sandwiched, and
• in the step of pressure-molding, there is formed, by transcription of the step in the tubular-shaped portion, a core concave-portion comprising a step on the outside surface of the core, with at least one of the terminal unit and the coil terminal-end as a boundary.