An exemplary camera module includes a barrel, a holder, and an resilient member. In the method, magnet material is milled into magnet powder. The relative positions of the detected defect and the mask pattern that is to be formed on the mask blank are compared, and the pattern position is selected such that the defect overlaps with the pattern. The molded slurry is caused to set, thereby forming a second molded part on the planar surface of the first mold. The second face is substantially perpendicular to the first face.