Patent ID: 7866029

Claim:
A forming method of a soft-magnetic pattern film with a narrower width, comprising the steps of: forming a base layer on/above an element forming surface of a substrate; forming a first frame layer having end surfaces facing each other across a space having a width W 1 on said base layer; forming a second frame layer having end surfaces facing each other across a space having a width W 2 in the same direction as said width W 1 which is larger than said width W 1 , said space having said width W 2 being located right above said space having said width W 1 ; forming a trench-forming film provided with a trench having a minimum width W 3 which is smaller than said width W 1 in the same direction as said width W 1 so as to fill at least a part of said space having said width W 1 and said space having said width W 2 ; forming a pattern film made of a soft-magnetic material so as to fill at least a part of said trench; and polishing said pattern film to form said soft-magnetic pattern film.