Thin film magnetic head



(57)【要約】 【課題】 高密度記録における書き込み・読み込み時の 性能向上をはかる。 【解決手段】 下部磁極3,ギャップ層4,導体コイル 6a〜6cおよび上部磁極を有する薄膜磁気ヘッドにお いて、上部磁極が先端磁極と後端磁極とで構成されてお り、上部後端磁極が上部先端磁極をすべてて覆って形成 され、上部後端磁極はスライダ浮上面10に露出してい る。そして、上部先端磁極と上部後端磁極の磁性材料は 異種材料からなり、かつ磁気的に結合している。この上 部先端磁極は高飽和磁束密度(Bs)の磁性材料からな っている。これにより、書き込み時の磁界強度および磁 界勾配を大きくできるため、磁気記録媒体に書き込まれ る磁化パターンの磁化反転領域を減少でき、再生出力の 半値幅(PW 50 )が減少し、リードエラーを抑制でき る。
PROBLEM TO BE SOLVED: To improve performance of a thin film magnetic head in writing and reading in high density recording. SOLUTION: In the thin film magnetic head having a lower magnetic pole 3, a gap layer 4, conductive coils 6a to 6c and an upper magnetic pole, the upper magnetic pole is composed of a top end magnetic pole and a rear end magnetic pole, the upper rear end magnetic pole is formed by covering whole of the upper top end magnetic pole and is exposed to a slider floating surface 10. Then, the magnetic materials of the upper top end magnetic pole and the upper rear end magnetic pole are made of different materials from each other and are magnetically bonded. The upper top end magnetic pole is made of a magnetic material of high saturation magnetic flux density (Bs). Since magnetic field intensity and magnetic field gradient at the time of writing-in can be made larger, a magnetization inversion region of a magnetization pattern written in a magnetic recording medium can be reduced, half-value width (PW 50 ) of reproducing output is reduced and rear error can be suppressed. COPYRIGHT: (C)1998,JPO




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Cited By (4)

    Publication numberPublication dateAssigneeTitle
    US-6130805-AOctober 10, 2000Tdk CorporationThin film magnetic head having upper pole chip formed over insulating layer
    US-6609291-B1August 26, 2003Tdk CorporationMethod of manufacturing a thin film magnetic head
    US-7061718-B2June 13, 2006Tdk CorporationThin film magnetic head having thin film coil embedded in first insulating layer covered with second insulating layer
    US-7810226-B2October 12, 2010Tdk CorporationMethod of manufacturing a thin-film magnetic head having an element having a lower layer with a narrower width