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    • 11. 发明授权
    • Thin-film magnetic head including two magnetic layers and flat spiral coil, and method of manufacturing same
    • 包括两个磁性层和扁平螺旋线圈的薄膜磁头及其制造方法
    • US07826175B2
    • 2010-11-02
    • US11797473
    • 2007-05-03
    • Kenji YokoyamaNaoto MatonoTatsuya HaradaKoichi OtaniHidetaka Kawano
    • Kenji YokoyamaNaoto MatonoTatsuya HaradaKoichi OtaniHidetaka Kawano
    • G11B5/17
    • G11B5/3116
    • A thin-film magnetic head includes a first magnetic layer, a flat, spiral-shaped coil, a toroidal-shaped insulating layer covering the coil, and a second magnetic layer touching the insulating layer and disposed to sandwich part of the coil between itself and the first magnetic layer. The second magnetic layer has a recessed portion that enters a space inside the insulating layer. In the recessed portion, the bottom surface of the second magnetic layer includes a first flat portion a part of which touches the top surface of the first magnetic layer, while the top surface of the second magnetic layer includes a second flat portion located in the space and substantially parallel to the first flat portion. In a cross section that divides each of the first and second magnetic layers into two equal portions, the second flat portion is 0.3 to 6 μm in length, and a distance from an edge of the interface between the top surface of the first magnetic layer and the first flat portion closer to the medium facing surface to an edge of the top surface of the first magnetic layer farther from the medium facing surface is 0.35 to 0.95 times the length of the first flat portion.
    • 薄膜磁头包括第一磁性层,扁平螺旋形线圈,覆盖线圈的环形绝缘层和接触绝缘层的第二磁性层,并且设置成将线圈的一部分夹在其自身与 第一磁性层。 第二磁性层具有进入绝缘层内的空间的凹部。 在凹部中,第二磁性层的底表面包括第一平坦部分,其一部分接触第一磁性层的顶表面,而第二磁性层的顶表面包括位于该空间中的第二平坦部分 并且基本上平行于第一平坦部分。 在将第一和第二磁性层中的每一个分成两个相等部分的横截面中,第二平坦部分的长度为0.3至6μm,并且与第一磁性层的顶表面之间的界面边缘与 第一平坦部分比第一平坦部分的长度更靠近第一磁性层的顶表面的与介质相对表面更远的介质面向表面的边缘的第一平坦部分是0.35至0.95倍。
    • 12. 发明申请
    • Thin-film magnetic head including two magnetic layers and flat spiral coil, and method of manufacturing same
    • 包括两个磁性层和扁平螺旋线圈的薄膜磁头及其制造方法
    • US20080273273A1
    • 2008-11-06
    • US11797473
    • 2007-05-03
    • Kenji YokoyamaNaoto MatonoTatsuya HaradaKoichi OtaniHidetaka Kawano
    • Kenji YokoyamaNaoto MatonoTatsuya HaradaKoichi OtaniHidetaka Kawano
    • G11B5/33
    • G11B5/3116
    • A thin-film magnetic head includes a first magnetic layer, a flat, spiral-shaped coil, a toroidal-shaped insulating layer covering the coil, and a second magnetic layer touching the insulating layer and disposed to sandwich part of the coil between itself and the first magnetic layer. The second magnetic layer has a recessed portion that enters a space inside the insulating layer. In the recessed portion, the bottom surface of the second magnetic layer includes a first flat portion a part of which touches the top surface of the first magnetic layer, while the top surface of the second magnetic layer includes a second flat portion located in the space and substantially parallel to the first flat portion. In a cross section that divides each of the first and second magnetic layers into two equal portions, the second flat portion is 0.3 to 6 μm in length, and a distance from an edge of the interface between the top surface of the first magnetic layer and the first flat portion closer to the medium facing surface to an edge of the top surface of the first magnetic layer farther from the medium facing surface is 0.35 to 0.95 times the length of the first flat portion.
    • 薄膜磁头包括第一磁性层,扁平螺旋形线圈,覆盖线圈的环形绝缘层和接触绝缘层的第二磁性层,并且设置成将线圈的一部分夹在其自身与 第一磁性层。 第二磁性层具有进入绝缘层内的空间的凹部。 在凹部中,第二磁性层的底表面包括第一平坦部分,其一部分接触第一磁性层的顶表面,而第二磁性层的顶表面包括位于该空间中的第二平坦部分 并且基本上平行于第一平坦部分。 在将第一和第二磁性层中的每一个分成两个相等部分的横截面中,第二平坦部分的长度为0.3-6μm,并且与第一磁性层的顶表面之间的界面的边缘与 第一平坦部分比第一平坦部分的长度更靠近第一磁性层的顶表面的与介质相对表面更远的介质面向表面的边缘的第一平坦部分是0.35至0.95倍。