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    • 23. 发明申请
    • Magnetoresistive Effect Head and Magnetic Recording/Playback Device
    • 磁阻效应头和磁记录/播放装置
    • US20100302688A1
    • 2010-12-02
    • US12784405
    • 2010-05-20
    • Masato ShiimotoKan YasuiNobuo YoshidaHiroyuki Takazawa
    • Masato ShiimotoKan YasuiNobuo YoshidaHiroyuki Takazawa
    • G11B5/127
    • G11B5/3932B82Y25/00G01R33/093G01R33/098H01L43/08H01L43/10
    • According to one embodiment, a magnetoresistive effect head includes a lower magnetic shield provided on a substrate, a magnetoresistive effect film laminated from a pinned layer with a pinned direction of magnetization, an intermediate layer, a free layer having a varying direction of magnetization controlled by an applied external magnetic field, a magnetic domain control layer formed with an intervening insulation layer on both sides in a track width direction of the magnetoresistive effect film, an upper magnetic shield, and electrodes for directing sense current flow in a direction perpendicular to a film surface of the magnetoresistive effect film, wherein a magnetic field applied by the magnetic domain control layer to a region away from an ABS of the free layer is at least 1.4 times larger than a magnetic field applied by the magnetic domain control layer to a region near the ABS of the free layer.
    • 根据一个实施例,磁阻效应头包括设置在基板上的下磁屏蔽,从具有钉扎方向的钉扎层层压的磁阻效应膜,中间层,具有变化的磁化方向的自由层, 施加的外部磁场,在磁阻效应膜的磁道宽度方向上在两侧形成有中间绝缘层的磁畴控制层,上磁屏蔽和用于引导垂直于膜的方向的感测电流的电极 磁阻效应膜的表面,其中由磁畴控制层施加到远离自由层的ABS的区域的磁场比由磁畴控制层施加到接近的区域的磁场的至少大1.4倍 ABS的自由层。
    • 24. 发明申请
    • Magnetoresistive Head With A CPP Structure Having Suppressed Side Reading
    • 具有抑制侧读的CPP结构的磁阻头
    • US20100142100A1
    • 2010-06-10
    • US12631295
    • 2009-12-04
    • Nobuo YoshidaKatsuro WatanabeMasahiro OusugiAtsushi Kato
    • Nobuo YoshidaKatsuro WatanabeMasahiro OusugiAtsushi Kato
    • G11B5/127
    • G11B5/3909B82Y10/00B82Y25/00G11B5/3932G11B2005/3996Y10T29/49032
    • According to one embodiment, a CPP structure magnetoresistive head includes a magnetoresistive sensor film between a lower shield layer and an upper shield layer and a longitudinal biasing layer disposed at each side of the magnetoresistive sensor film via a read track width defining insulator film. In the stripe height direction, the length of the longitudinal biasing layer is longer than the length of a second ferromagnetic layer in which its magnetization rotates in response to the external magnetic field. The second ferromagnetic layer is one of the layers comprising the magnetoresistive sensor film. At a stripe height, the surface of each longitudinal biasing layer has a step to change the thickness thereof across the step so that the air bearing surface section thereof has a larger thickness than any other section. Other structures using a magnetoresistive head and methods of production thereof are described as well.
    • 根据一个实施例,CPP结构磁阻头包括在下屏蔽层和上屏蔽层之间的磁阻传感器膜和经由读磁道宽度限定绝缘膜设置在磁阻传感器膜的每一侧的纵向偏置层。 在条带高度方向上,纵向偏置层的长度长于其磁化响应于外部磁场而旋转的第二铁磁层的长度。 第二铁磁层是包括磁阻传感器膜的层之一。 在条带高度处,每个纵向偏置层的表面具有改变其横跨该台阶的厚度的步骤,使得其空气轴承表面部分具有比任何其它部分更大的厚度。 还描述了使用磁阻头的其它结构及其生产方法。
    • 27. 发明授权
    • Magnetic recording head and method for manufacturing
    • 磁记录头及制造方法
    • US07333301B2
    • 2008-02-19
    • US10650832
    • 2003-08-29
    • Kimitoshi EtohNobuo YoshidaMoriaki FuyamaMakoto MorijiriKenichi MeguroIchiro OodakeKazue KudoYohji MaruyamaKatsuro Watanabe
    • Kimitoshi EtohNobuo YoshidaMoriaki FuyamaMakoto MorijiriKenichi MeguroIchiro OodakeKazue KudoYohji MaruyamaKatsuro Watanabe
    • G11B5/127
    • B82Y25/00B82Y10/00G11B5/3136G11B5/3909G11B5/3912Y10T29/49044
    • A thin-film magnetic head having little temperature rise in the element, good heat dissipation and a short magnetic path length (narrow coil pitch) and manufacturing method for same is provided. To form the coil of the thin-film magnetic head, a lower coil is first formed and after forming alumina and an inorganic compound containing alumina, a trench is formed for the upper coil by reactive ion etching. The lower coil allows uniform etching at this time and functions as a film to prevent loading effects occurring during reactive ion etching. This trench is then plated in copper and chemical mechanical planarization performed to form the upper layer coil as the dual-layer coil of the present invention. Heat from the coil is efficiently radiated towards the substrate by alumina and an inorganic compound containing alumina with good heat propagation. The ratio of alumina or inorganic compound containing alumina in the lower coil can be selected by reactive ion etching so that an upper coil trench functioning as an etching stopper can be securely formed to allow forming a stable coil film thickness and a short magnetic path length.
    • 提供元件温度上升较小,散热好,磁路长度短(窄线圈间距)及其制造方法的薄膜磁头。 为了形成薄膜磁头的线圈,首先形成下线圈,在形成氧化铝和含有氧化铝的无机化合物之后,通过反应离子蚀刻形成用于上部线圈的沟槽。 此时,下线圈允许均匀刻蚀,起到膜的作用,以防止在反应离子蚀刻期间发生的负载效应。 然后将该沟槽镀铜并进行化学机械平面化以形成上层线圈作为本发明的双层线圈。 来自线圈的热量通过氧化铝和含有良好热传播的氧化铝的无机化合物有效地朝向基板辐射。 可以通过反应离子蚀刻来选择下层线圈中的氧化铝或含有氧化铝的无机化合物的比例,从而可以可靠地形成用作蚀刻停止层的上部线圈沟槽,以形成稳定的线圈膜厚度和短的磁路长度。