发明授权
- 专利标题: Heat treatment method for thin film magnetic head
- 专利标题(中): 薄膜磁头热处理方法
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申请号: US402893申请日: 1995-03-13
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公开(公告)号: US5503686A公开(公告)日: 1996-04-02
- 发明人: Yuko Okamura , Keiji Ohkubo , Osamu Saito , Toyoji Ataka
- 申请人: Yuko Okamura , Keiji Ohkubo , Osamu Saito , Toyoji Ataka
- 申请人地址: JPX Kawasaki
- 专利权人: Fuji Electric Co., Ltd.
- 当前专利权人: Fuji Electric Co., Ltd.
- 当前专利权人地址: JPX Kawasaki
- 优先权: JPX6-044535 19940316
- 主分类号: C21D1/04
- IPC分类号: C21D1/04 ; C22F1/10 ; G11B5/31 ; G11B5/39
摘要:
A magnetic recording head that includes a combined IN element and an MR element is heat treated under two types of magnetic fields. A rotating magnetic field, having a first magnetic field intensity, is applied for a time while the magnetic recording head is at an elevated temperature. Then, part-way during cooling of the magnetic head, the rotating magnetic field is replaced by a direct (non-rotating) magnetic field having a second magnetic field intensity. The second magnetic field intensity is lower than the first magnetic field intensity, whereby the properties of both the IN element and the MR element are maintained at high values.
公开/授权文献
- US6153786A Method for producing 2-alkynoic acid esters 公开/授权日:2000-11-28