Patent ID: 9269389
Filing Date: 2016-02-23
CPC Classification: C22C,C23C,G11B,H01F

Claim Text:
1. A sputtering target of a magnetic material, having a cast structure obtained by melting and succeeding casting, wherein the sputtering target has a composition consisting of B in an amount of 10 at % or more and 50 at % or less, one or more elements selected from the group consisting of Co, Fe, and Ni, and impurity oxygen in an amount of 100 wtppm or less, and wherein the sputtering target has a location to location variation of B content defined as (Am−A)/A in an amount of 0.01 or less within the sputtering target, where A is a content of B of the sputtering target as a whole and Am is a content of B analyzed for an arbitrarily selected location having an area of 1 mm square within the target.