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    • 1. 发明授权
    • Magneto-resistance effect type head and information reproducing apparatus
    • 垂直偏置底层和磁阻效应型头
    • US06493197B2
    • 2002-12-10
    • US09955358
    • 2001-09-18
    • Junichi ItoMichiaki KanamineHitoshi Kanai
    • Junichi ItoMichiaki KanamineHitoshi Kanai
    • G11B539
    • B82Y25/00B82Y10/00G11B5/00G11B5/3113G11B5/3903G11B5/3932G11B2005/3996
    • The present invention provides a magneto-resistance effect type head for reproducing, with a high sensitivity, information recorded at a high recording density on a recording medium while inhibiting occurrence of the Barkhausen noise, including a magneto-resistance effect element comprised of a multi-layer film containing a free magnetic layer having its magnetization direction changing in correspondence with an external magnetic field, an insulating film, a non-magnetic underlying layer formed on the insulating film, and one pair of magnetic domain-wall control layers formed on the underlying layer in its in-face direction with a predetermined spacing therebetween, for inhibiting movement of magnetic domain wall of the free magnetic layer, in such a configuration that the free magnetic layer has its both ends directly stacked on the pair of the magnetic domain-wall control layers and also has its middle part directly stacked on the underlying layer.
    • 本发明提供了一种用于以高灵敏度将以高记录密度记录在信息记录介质上的信息同时抑制巴克豪森噪声的发生的磁阻效应型磁头,包括由多声道组成的磁阻效应元件, 其包含其磁化方向与外部磁场相对应地变化的自由磁性层,绝缘膜,形成在绝缘膜上的非磁性下层,以及形成在底层上的一对磁畴壁控制层 层之间以预定的间隔在其面内方向上,用于抑制自由磁性层的磁畴壁的移动,使得自由磁性层的两端直接堆叠在一对磁畴壁上 控制层并且其中间部分直接堆叠在下层上。
    • 6. 发明授权
    • Thin film magnetic head for perpendicular recording and reproducing
    • 用于垂直记录和再现的薄膜磁头
    • US4974110A
    • 1990-11-27
    • US361181
    • 1989-06-05
    • Michiaki KanamineTakao Koshikawa
    • Michiaki KanamineTakao Koshikawa
    • G11B5/31G11B5/127
    • G11B5/1278
    • A thin film magnetic head for perpendicularly recording and reproducing is disclosed. The magnetic head comprises a main magnetic pole of a thin film, a spiral coil of an electrically conductive film disposed on one side of the main magnetic pole, a first auxiliary magnetic pole of a thin film covering the coil, and a second auxiliary magnetic pole disposed on the other side of the main magnetic pole, forming a substrate or being formed on a non-magnetic substrate. The distributed magnetic leakage path between the main magnetic pole and the second auxiliary magnetic pole plays an important role in the present invention. When the second auxiliary magnetic pole is properly arranged, the magnetic flux flowing through two magnetic paths and interlinking the coil, are cancelled by each other and edge noise due to magnetic flux generated at the second auxiliarly magnetic pole by a magnetic transition of the recording medium is minimized. The low edge noise characteristic enhances the recording and reproducing efficiency of the thin film magnetic head.
    • 公开了用于垂直记录和再现的薄膜磁头。 磁头包括薄膜的主磁极,设置在主磁极一侧的导电膜的螺旋线圈,覆盖线圈的薄膜的第一辅助磁极和第二辅助磁极 设置在主磁极的另一侧,形成基板或形成在非磁性基板上。 主磁极和第二辅助磁极之间的分布式磁泄漏路径在本发明中起重要作用。 当适当地布置第二辅助磁极时,流过两个磁路并使线圈互相连接的磁通被彼此抵消,并且由于记录介质的磁转变而在第二辅助磁极产生的磁通产生的边缘噪声 被最小化。 低边缘噪声特性增强了薄膜磁头的记录和再现效率。