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Permanent magnet thin film and its manufacturing method 发明授权

2023-02-25 3840 107K 0

专利信息

申请日期 2025-06-26 申请号 JP2000044175
公开(公告)号 JP4337209B2 公开(公告)日 2009-09-30
公开国别 JP 申请人省市代码 全国
申请人 SUMITOMO SPEC METALS
简介 Refractory metal layers 2, 4, 6, 8, and 10, and rare earth alloy magnetic layers 3, 5, 7, 9, 11, and 12 are alternately deposited, so as to form a multilayer structure including four or more layers on a substrate. The refractory metal layers 2, 4, 6, 8, and 10 are formed from at least one kind of material selected from a group consisting of Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, and W, and each has a thickness of not less than 5 nm nor more than 50 nm. The rare earth alloy magnetic layers 3, 5, 7, 9, 11, and 12 have tetragonal R2Fe14B (R is Nd and/or Pr) as a primary constituent phase, and each has a thickness of not less than 50 nm nor more than 500 nm.


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