Patent ID: 9171668
Filing Date: 2015-10-27
Classification: H01F,Y10T

Abstract:
1. A magnet member comprising: a magnet base body including a rare-earth magnet; and a plating film containing Ni that covers the magnet base body and forms an outermost layer of the magnet member, the plating film containing Ni comprising (i) a center part that coincides with a center of the magnet base body, and (ii) a marginal part; wherein the plating film containing Ni has a sulfur content lower in the marginal part of the outermost layer of the magnet member than in the center part of the outermost layer of the magnet member, wherein a surface of the plating film containing Ni that forms the outermost layer of the magnet member is perpendicular to an easy magnetization direction of the magnet base body, and wherein the center part of the plating film containing Ni is surrounded by the marginal part of the plating film containing Ni, the center part having a 50% reduction ratio relative to the marginal part, wherein the plating film containing Ni is thicker in the marginal part than in the center part.