Patent ID: 7181827

Claim:
A method of forming a magnetic layer pattern, the magnetic layer pattern extending to a predetermined extending direction, the method comprising: a first step of forming a photoresist pattern on a base layer so that the photoresist pattern includes a first frame portion and a second frame portion which face each other in a width direction and determine an aperture, and the first frame portion and the second frame portion have a different width from each other; a second step of heating the photoresist pattern so as to deform the first frame portion and the second frame portion so that the widths thereof are gradually increased toward the base layer, thereby the width of the aperture is gradually reduced toward the base layer; a third step of forming a magnetic layer pattern in the aperture by using the photoresist pattern; and a fourth step of removing the photoresist pattern, wherein the magnetic layer pattern is formed so that an end surface in the extending direction has a trapezoidal shape in which one edge determining a first base angle and a second base angle is a longer side in a pair of sides parallel to each other, and the other edge is a shorter side in the pair of sides, and the first base angle and the second base angle are different from each other.